10 best compass geometries

Compass geometries refer to the principles and techniques used in geometry and technical drawing when using a compass—a tool used for drawing precise circles and arcs. Compasses are commonly used in various fields, including technical drawing, mathematics, and engineering. Here's what you need to know about compass geometries:

Basic Compass Components:
- A compass typically consists of two arms—one with a pointed end (the needle) and the other with a pencil or pen holder.
- The arms are joined at a hinge or pivot point, allowing for precise adjustments of the radius of the circle or arc to be drawn.
Drawing Circles:
- To draw a circle using a compass, you place the pointed end of the compass at the center of the circle and adjust the radius by loosening or tightening the hinge.
- Once the desired radius is set, you rotate the compass around the center point, keeping the pencil or pen in contact with the paper, to create a perfect circle.
Drawing Arcs:
- Compasses are also used to draw arcs, which are segments of a circle. To draw an arc, you set the desired radius and pivot the compass while maintaining contact with the paper.
- You can draw arcs of various angles by adjusting the compass accordingly.
Constructing Geometric Shapes:
- Compasses play a crucial role in geometric constructions. They can be used to bisect angles, divide segments into equal parts, and create various geometric shapes such as triangles, squares, and hexagons.
- Geometric constructions are often used in mathematics and engineering to solve problems and prove theorems.
Precision and Accuracy:
- Compasses are valued for their precision and accuracy in creating perfect circles and arcs, making them essential tools for technical drawing, drafting, and design work.
- They allow for the creation of symmetrical and proportionate shapes with consistent radii.
Applications:
- Compasses are commonly used in technical drawing and drafting for architectural plans, engineering diagrams, and other detailed illustrations.
- They are also used in mathematics education to teach geometry concepts and constructions.
- Additionally, compasses have applications in art and design for creating intricate patterns and designs.
Types of Compasses:
- There are various types of compasses available, including traditional analog compasses and digital compasses with electronic features.
- Some compasses are designed specifically for technical drawing, while others are more versatile and suitable for a wide range of applications.

In summary, compass geometries involve the use of compasses as essential tools for creating precise circles, arcs, and geometric shapes in technical drawing, mathematics, engineering, and design. They are valued for their accuracy and versatility in various fields and are indispensable for anyone involved in precise drafting or geometric construction work.

Below you can find our editor's choice of the best compass geometries on the market

Mr. Pen Geometry Set with 6 Inch Swing Arm Protractor, Divider, Set Squares, Ruler, Compasses and Protractor, 15 Piece Set

Based on 12 reviews Check latest price

Geometry Set For All Levels Designed in USA
Package Includes 15 Piece: 2 Metal Compasses (1 Study Compass & 1 Graphic Compass), 1 Extra Lead for Graphic Compass, 1 Metal Divider, 2 Pencils for Compass, 1 Mechanical Pencil (0.5 mm) for Compass, 1 Pack of 0.5 mm Lead for Mechanical Pencil, 1 Eraser, 1 Metal Pencil Sharpener, 1 Ruler (6”), 1 Set Square (30°/60°), 1 Set Square (45°), 1 Protractor, 1 Protractor with Swing Arm (6”)
15 Piece Geometry Set, Compass Set in a Reusable Pouch, Easy to Carry and Store
Inch and Centimeter Measurements
The Math Set/Geometry Set Designed by Experienced Math Experts with All Essential Items for Teachers and Students at Any Level

User questions & answers

Question:	does the divider have a screw adjustment
Answer:	The metal compasses do. The 6" plastic protractor with swing arm doesn't.
Question:	What size lead does the compass use
Answer:	The size of the compass lead is 2mm in diameter, and 1 cm in length. There is another compass in the set that you can use with almost any pen or pencils. the set comes with 2 #2 pencils.
Question:	How big of a circle can I draw
Answer:	Hi, Thanks for your question. There are two compasses in the set. One has its own lead and it opens up to 6.5" meaning 13" circle in diameter. The other one you can use with pencils, pens, markers,... and it opens up to 5.25" i.e. 10.5" circles.
Question:	How do I use the divider
Answer:	Usually dividers are used to transfer measurements without leaving a mark. Also you can use them to mark measurements on paper, wood and...So you measure something with your divider then you can transfer it to other things, multiple times, without measuring again and again or leaving a mark with pencils or pens.

Product features

Mr. Pen Story: Committed to Quality and Service

What's Included:

How to use:

Open the compass to the radius desired for your circle.
Place the compass point on a piece of paper where you would like the center point of the ring.
Place the position of the pencil/lead on the paper.
Rotate the compass to mark a circle on the paper with a pencil. Draw without lifting the point of the compass of the paper.

Mr. Pen- Professional Compass for Geometry, Extra Lead, Metal Compass, Compass, Compass Drawing Tool, Drawing Compass, Drafting Compass, Compass for Students, Compass for Woodworking, Compass Geometry

Based on 587 reviews Check latest price

1 High Quality Professional Bow Compass For Math, Geometry, Art, Drafting And Drawing; Creates Circles Up To 8 Inches In Diameter
Precision Geometry Compass With Spring Bow Head And Center Wheel Prevents Unintentional Leg Movements
All Metal, Nickel Plating Compass, Lifelong Satisfaction Guaranteed
Easy To Adjust Legs, Great For Precise Drawings
Packaged In A Clear, Reusable Pouch. Easy To Carry And Store

User questions & answers

Question:	Does this compass stay tight at the wheel when using? My Staedtler Compass moves every turn and is not consistent
Answer:	Yes. It’s a great tool! I’ve had same frustration with others. Enjoy construction activities with this compass!
Question:	How do we keep the lead sharp - does it come with a sharpener
Answer:	There is no sharpener but it comes with many many new tips even a couple extra metal ones. i did read you can request new tips any time for free.
Question:	What type of lead is included...2h, hb, or 2b
Answer:	Not sure, and the label that might have told is now gone, but it is not hard, and it's quite wide.
Question:	How small is the smallest drawable circle
Answer:	I just drew a circle in the all-the-way closed position. It was 5/8".

Ruler and Compass: Practical Geometric Constructions (Wooden Books)

Based on 278 reviews Check latest price

Westcott Metal Ball Bearing Compass with Pencil, Nickel Plated

Westcott

Based on 1 reviews Check latest price

All nickel metal plated
Easy grip top control
Adjusts to draw circles up to 13" diameter
Includes pencil

User questions & answers

Question:	can it lock in place
Answer:	Yes, you can lock it in place.
Question:	Will it fit a standard Bic pen
Answer:	Yes, a standard Bic pen will fit this Compass.
Question:	how do you adjust it to go past 6 inches. I need a 8.5 " circle
Answer:	Westcott Metal Ball Bearing Compass with Pencil draws circles up to 13" diameter. To draw a 8.5" circle adjust the settings to 4.25

Offizeus Professional Compass for Geometry with Extra Lead Refills - Makes 10 Inch Circle - Math Compass, Drawing Compass - Metal Precision Bow Compass with Lock - for Drafting, School, Woodworking

Based on 2 reviews Check latest price

PLEASURE TO USE STURDY SPRING BOW COMPASS - Adjustment wheel with automatic locking mechanism makes drawing easy and fun, you never want to return to plastic compass again!
WITH PLENTY OF SPARE PARTS - OFFIZEUS compass comes with 9 spare leads, extra steel needle tip and spare holding screws and nuts.
PERFECT FOR KIDS AND ADULTS - Excellent for use in school, woodworking, or at home. The best circle drawing tool for student, artist, mathematician, carpenter.
CARRY POUCH - Everything packaged nicely in reusable clear pouch for easy to carry and store.
100% SATISFACTION OR YOUR MONEY BACK - That’s our unconditional guarantee! If you’re not 100% satisfied with your purchase, we promise to offer you a prompt and full refund or ship you a replacement, so you can buy with peace of mind.

User questions & answers

Question:	The lead is actually graphite, correct
Answer:	It seems to be graphite - I don't have equipment to test its composition, so can't say definitively.
Question:	Where is it made
Answer:	China.
Question:	How small of a diameter can it produce
Answer:	Hi, Thanks for asking. You can draw about 0.4 inch (1 cm) diameter circle.
Question:	how wide a diameter circle
Answer:	The diameter of the circle you can draw is 9 to 10 inches depending how you have set up the lead / needle tips and how worn out the lead tip is. Thanks for asking!

Product features

PRECISION BOW COMPASS - ALL METAL DESIGN

OFFIZEUS precision bow compass / divider includes easy-to-use adjustment wheel and locking mechanism preventing leg movement during drawing. By adjusting center wheel you can easily change the radius of the circle.

When the desired radius is achieved, the mechanism is automatically locked to adjusted position. Compass is equipped with 2mm diameter lead refill tips and needle and they are easily replaceable. They are attached to compass with thumb screws, no tools are required.

PLEASURE TO USE

Adjustment wheel with automatic locking mechanism makes drawing easy and fun.

IDEAL TOOL FOR:

Students, Teachers, Carpenters, Woodworkers, Metalworkers, Engineers, Architects, Mathematicians, Artists, Craftsmen, Designers.

PACKAGE INCLUDES

Precision bow compass
10 lead tips packed in 3 plastic tubes
2 needle tips
2 spare screws and nuts
Clear reusable pouch

The Painter's Secret Geometry: A Study of Composition in Art (Dover Books on Fine Art)

Dover Publications

Based on 150 reviews Check latest price

Product features

Art History, Art Instruction & Fine Art Books at www.doverpublications.com

Mr. Pen- Professional Compass for Woodworking, 8 Inch Compass with Wing, Large Compass for Geometry, Compass Drawing Tool, Woodworking Compass, Pencil Compass for Carpenter, Drafting, Drawing Compass

Based on 250 reviews Check latest price

Professional All Metal Compass/Divider For Woodwork, Carpentry, Metal Work, Leather Work, Math, etc. - Leg Length: 8 Inches
Pencil Holder To Easily Draw Circles Up To 18” In Diameter
Can Be Used As A Scribe Or Divider To Quickly Measure And Copy Measurements
Draws Arcs And Circles Repetitively With High Dimensional Accuracy With The Lockable Wing Design
Made From High Quality Steel, It Will Not Rust Or Get Corroded

Mr. Pen- Professional Compass with Lock and Free Life TIME Lead Replacement, Compass for Geometry, Spring Bow Compass, Precision Compass Math, Drafting Compass, Compass Drawing, Metal Compass

Based on 1 reviews Check latest price

1 High Quality Professional Compass/Divider For Math, Geometry, Art, Drafting And Drawing, Creates Circles Up To 9 Inches In Diameter
Precision Geometry Compass With Spring Bow Head And Center Wheel Prevents Unintentional Leg Movements
All Metal, Nickel Plating Compass, Lifelong Satisfaction Guaranteed
FREE LIFE TIME Lead Replacement, Contact us via Amazon and we will ship them to you for free. 2 Pieces Of Spare Lead Includes in The Package.
Packaged In A Clear, Reusable Pouch. Easy To Carry And Store

User questions & answers

Question:	What size lead does this use
Answer:	It's a specially shaped lead. I would imagine you would need refills designed specially for a compass and they all seem pretty interchangeable.
Question:	Can I put a regular pencil in this and use this
Answer:	No. It will only accept lead points. The opening is not large enough to accommodate a pencil.
Question:	No matter how much i tighten the screws, both the lead and needle push up when i try to draw a circle. how can i prevent this
Answer:	When I replace the lead I make sure the screws are loose enough for me to slide the lead all the way to the back of the compass. Then tighten it slowly and make sure the lead hasn’t moved while I tighten it more. I had the same problem when I first replaced the lead but found the right way to tighten the lead.
Question:	Are extra leads easily available, if needed
Answer:	Hi, Thank you for your question. You can just message us on Amazon or email us and we will ship you extra lead anytime. free of charge.

Product features

Prevent Unintended Movement

With Spring Bow Head And Thumb wheel To Prevent Unintended Movement In The Legs

All Metal:

All Metal, Nickel Plating, Compass/Divider Durable For Life

IDEAL TOOL FOR:

Students,Teachers,Carpenters,Woodworkers,Metalworkers,Engineers,Architects,Mathematicians,Artists,Craftsmen,Designers

Math Teacher Keychain, Mathematics Teacher Keychain, Teacher Keychain, Architect, Architectural Engineer Teacher, Geometry, Compass, Math Book, Math Ruler, Teacher Gift, Math Teacher Key Ring

Kit's Kiss

Based on 20 reviews Check latest price

Product description

Teacher keychain, Math Teacher keychain. Silver Tone Metal Charms, Zinc alloy

Teacher key ring, Math Teacher key ring, Architect Teacher keychain
Teacher charm, Math book charm, Math ruler charm, Compass charm
Diameter of key ring : 1.2 inches (3 cm)
Length of keychain : 2.36 inches (6 cm)
Free pouch gift bag to pack and ship our keychain

Mr. Pen- Professional Large Compass for Woodworking, 12 Inch Compass with Wing, Compass for Geometry, Compass Drawing Tool, Woodworking Compass, Pencil Compass for Carpenter, Drafting, Drawing Compass

Based on 230 reviews Check latest price

Professional All Metal Compass/Divider For Woodwork, Carpentry, Metal Work, Leather Work, Math, Etc.
The Compass Leg Measure 12 Inch And Can Draw Circles Upto 30 Inch (76 cm) in Diameter
Designed With A Pencil Holder To Easily Change The Pencil For Sharpening Purposes (Pencil Is Not Included)
Can Be Used As A Scribe Or Divider To Quickly Measure lengths And Copy Measurements
Lockable Sliding Nut Design Allows For Quick Leg Adjustment And Repeatable Measurements

User questions & answers

Question:	how do I make a 39 inch circle
Answer:	You need something like a yardstick compass, which are point and pencil adapters that slide onto a standard yardstick. https://smile.amazon.com/Alumicolor-Compass-Drawing-Cutting-Circles/dp/B007RFPVSC/ https://smile.amazon.com/70036-Yardstick-Compass-Lead-Pin-Post/dp/B00BB58ADW/
Question:	Great Compass , but we’re missing the two set screws
Answer:	The carpenter's 12" compass I received lacked the locking and pencil retention screws necessary for its use. I e-mailed the Mr. Pen folks to request the screws early that evening. They responded via e-mail around three the next morning apologizing for the problem and stating that if I'd send them my Amazon order number they would be happy to send me a new compass. I did so and received notification that my order had shipped that same day. Two days later I received my new compass. No hassle and prompt, cheerful customer service make this a great outfit to do business with. And yes, the product was of great quality.