The Best Semi Circle Ruler of 2022 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Semi Circle Ruler of 2022. Check our ranking below.
2,700 Reviews Scanned
Rank No. #1
STAEDTLER Math Set - 4 pc Geometry Kit for Students - School Supplies with Clear Protractor, 6in Ruler & 2 Triangles – Metric & Imperial Scales
- COMPLETE GEOMETRY SET - Everything you need in one portable kit: a 6 inch ruler, 180 degree protractor, and two triangle rulers (45° and 60°). From basic sketches to complex drawings, you're covered
- PRECISION AT YOUR FINGERTIPS - Clear rulers and triangles with both metric and imperial scales let you measure with pinpoint accuracy. No more squinting or second-guessing your measurements
- SMART DESIGN FEATURES - The compact wallet keeps your geometry tools organized and protected. No more digging through backpacks or dealing with lost or broken pieces. Perfect for use in a classroom or on the go
- FOR STUDENTS AND PROFESSIONALS - This starter kit has all the most-used geometry and drafting tools needed for all students ranging from elementary to college. Encourage your budding engineer, architect, or artist by giving them the perfect geometry set that will follow them out of school and into their career.
- STAEDTLER - Leading manufacturer and supplier of writing, paint, drawing and modeling products that help people around the world realize and share their ideas
SaleRank No. #2
EBOOT Plastic Protractor Math Protractors 180 Degrees, 6 Inch, Pack of 2 (Clear)
- Measuring range: protractor measures 0 to 180 degrees left to right and right to left; Protractor with inch and centimeter marks makes measuring easy
- 2 Pack protractors: practical quantity, you can leave one at home and put the other at school or office; Appropriate size to use for geometry drawing and math class
- Size and material: the size of the plastic protractor is 6 inch, color is clear; With hollow center, the student protractor is easy to grip
- Use easily: you can use the geometry protractors to get the angle and length quickly; Easy to carry in bag, pencil case, math tool case, backpack, etc.
- Wide application: the ruler protractors are suitable for painting, measure, homework, technical drawing; You can send them to your friends and classmates
SaleRank No. #3
Sparco Plastic Protractor, 6-Inch Long, Clear (SPR01490)
- Professional protractor features an open center and accurate 6-Inch ruler across the base
- Sharply defined raised graduations are black-bonded in crystal-clear plastic
- Plastic material, clear color
- English (Publication Language)
SaleRank No. #4
Drawing Compass and 6 Inch Protractor, Student Geometry Math Set
- 2 Piece math set: compass and protractor are great for drawing circle and measuring angle, good for students, teachers, engineers, designers, artists, etc.
- 2 Diverse tips design compass: compass is made of stainless steel, sturdy mechanism can hold a radius well; The opposite side of the pencil end is an adjustable separated jaw which allows you to fix the ink or paint
- Integrated compass package: compass comes with a clear box, contain 1 piece geometry compass and 1 box refill packaged in a transparent box, convenient for organized and carry
- 6 Inch protractor: made of plastic, inch marks is up to 6 inch, centimeter marks is up to 10 cm; Range of 0 to 180 degrees, and clear color allow you see the words, letters, figures on page through the protractor
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
Rank No. #5
Unjoo Clear Plastic 6 Inch Straight Ruler, Shatterproof With Inches and Centimeters for School, Classroom, Home, or Office (2pcs)
- Clear color rulers: Ruler allows for a clear view of numbers and letters on the page; with the clear Mathematics ruler, you can measure an object easily
- 2 Measuring scales: centimeter scale is on one edge of the ruler and inch scale is on the other edge; Can meet your different measuring needs
- Long Lasting and sturdy: the plastic straight ruler is made of good quality plastic, flexible, and shatter-resistant plastic that won't break when bent, but avoid put too much force on the straight ruler
- Wide application: a useful measuring tool for artists, designers, architects, engineers, students and so on; Suitable for classroom, school, office, home, etc
- 2 Pack plastic clear ruler: It features both imperial and metric measurements, with inches and 1/16 inch markings along one edge, plus centimeters and mm markings along the other edge, size is 16 x 2. 9 cm, 2 mm in thickness
Rank No. #6
Zonon 1 Set Plastic Geometry Math Set Includes Drawing Compass, 6 and 4 Inch Protractor, 45/60 Degree Triangle Rulers 12 and 6 Inch Math Ruler Transparent for Office Supplies(Clear)
- Geometry Math Set: whether you are an artist, designer, architect, engineer, this comprehensive math set is a practical measuring tool for all your needs; It combines 2 protractors of 6 inches and 4 inches, 2 triangle rulers of 45 degrees and 60 degrees, 2 straight rulers of 6 inches and 12 inches, and 1 compass in a box; Enjoy the convenience of choosing a suitable ruler for your project and drafting need
- Quality Material and Design: crafted from quality plastic, the protractors and rulers are sturdy and durable, making them ideal for prolonged use; The compass is made from stainless steel, ensuring sturdiness and precision; The clear color enhances visibility, allowing you to easily see patterns or text beneath the rulers
- Precision and Ease of Measurements: the protractors can measure from 0 to 180 degrees on both sides, with precise markings up to 1 degree increments, facilitating quick and accurate measurements; The triangle rulers and straight rulers are marked on both sides in inches and centimeters for versatility, providing significant convenience for drawing geometric shapes, and more
- Innovative Hollow Design: adopting a hollow design, the triangle rulers and hollow protractor can better grip the paper; Additionally, the hollow protractor has a hole at the bottom, aiding in the positioning of points when drawing different angled geometric figures
- Versatile and Essential Tools: this compass and protractor are practical tools for drawing circles and measuring angles, respectively, making them a must have for teachers, engineers, designers, artists, among others; This clear plastic ruler set proves to be an indispensable addition to your ruler bulk collection
Rank No. #7
Mr. Pen Geometry Set with 6 Inch Swing Arm Protractor, Divider, Set Squares, Ruler, Compasses and Protractor, 15 Piece Set, Back to School Supplies
- 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
Rank No. #8
waremew 8 Pcs Compass/Math Set for Students with Shatterproof Storage Box, Geometry Set for School, Includes Ruler, Protractor, Compass, Pencil,Pencil Sharpener and Eraser,etc. Perfect Gift
- 8 Piece Geometry Set For All Levels Designed:The Math Set/Geometry Set Designed by Experienced Math Experts with All Essential Items for Teachers and Students at Any Level. Age:Over 6 years old.
- Package Includes:1 PC pencil, 1 PC Pencil sharpener, 2 PCS triangle rulers,1 PC straight ruler, 1 PC protractor,1 PC graphic compass and 1 eraser.
- With durable and shatterproof iron case, to protect and keep tools in one place in a backpack or desk.Easy to carry and store.
- A convenient choice for teachers and students:It's also a perfect gift for your kids and friends,easy to take to class and to store in the classroom and at home.
- 100% quality assurance&100% customer satisfaction: please contact us if you meet any trouble regarding this product.
Rank No. #9
EBOOT 2 Pcs Plastic Protractor Clear 180 Degrees Transparent Protractor for Geometry, 4 Inch and 6 Inch(Pink)
- Material: plastic; Color: clear
- 2 Pieces Protractors, 6 inch and 4 inch
- Protractor measures 0 to 180 degrees left to right and right to left
- 6 Inch protractor with inch and centimeter marks makes measuring easy
- 4 Inch protractor is small and convenient to use
Rank No. #10
Cretty-Meet 3 PCS 180 Degrees Clear Plastic Protractors 4" Transparent Semicircle Angle Measurement Ruler Basic Protractor for Geometry School Teacher Math Office
- These protractor scales are clear and precise, easy to measure and read, with identifying lines for every 10 degrees, and can be measured left-to-right or right-to-left.
- Geometry protractors are made of high-quality plastic, thick and strong, lightweight, compact, easy to carry and store.
- Semicircle protractor size: 10.1 x 5.7cm / 4.0 x 2.2", measurement range: 0 to 180 degrees. Color: Transparent.
- Suitable for teachers, engineers, designers, architects and others with measurement needs. For work or school, hobby or weird curiosity.
- Packaging: 3 PCS Clear Plastic Protractors.
Last update on 2025-08-12 / Affiliate links / Images from Amazon Product Advertising API
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- Specifications: How powerful they are can be measured.
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- Product Quality: You don’t always get what you pay for with an Semi Circle Ruler, sometimes less, and sometimes more.
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