Curated OER
Acute Triangles
Learners study acute triangles. They measure angles using a protractor, then classify the triangles as either right, obtuse, or acute. Everyone creates a design for a Navajo rug using only acute triangles.
Curated OER
Measuring Angles
For this measuring angles worksheet, students solve 10 problems in which angles are measured with a protractor and labeled with: acute, obtuse, right.
Beacon Learning Center
Beacon Learning Center: Anglemania!
Students explore four types of angles in this interactive web lesson.
Math.com
Math.com: Building Blocks: Classifying Angles
This geometry resource investigates types of angles. Definitions, detailed examples, and practice problems are included.
Mr. Martini's Classroom
Mr. Martini's Classroom: Geometry Special Angle Pairs and Parallel Transversals
Students are challenged to identify and measure angles created by parallel lines and a transversal as well as complementary and supplementary pairs.
Khan Academy
Khan Academy: Review: Measuring Angles Review
Demonstrates how to use an interactive protractor to measure angle size. Includes three practice questions and explanations of their solutions.
Sophia Learning
Sophia: Measuring Angles With a Protractor
Students learn how to measure angles with a protractor. Detailed examples are included in the video lesson.
Science Struck
Science Struck: How to Use a Protractor to Measure and Draw Angles
Step-by-step instructions accompanied by illustrations that demonstrate how to use a protractor to draw angles and to measure angles.
Khan Academy
Khan Academy: Measure Angles
Measure angles using a protractor. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Purple Math
Purplemath: Greek Letters and Their Names
When you are working with geometry and trigonometry, you will see a lot of Greek letters. It will be helpful to know how the names of these letters are spelled and pronounced.
![Educaplus: Medida De Angulos [In Spanish] Activity](https://content.lessonplanet.com/knovation/original/438782-60bc9e768dd7b8aa5c7d013dceea2c55.jpg?1661599529 "Educaplus: Medida De Angulos [In Spanish] Activity")
Educaplus (Jesús Peñas Cano)
Educaplus: Medida De Angulos [In Spanish]
Practice measuring angles with the protractor with this interactive activity.
CK-12 Foundation
Ck 12: Elem Math: Using a Protractor
[Free Registration/Login may be required to access all resource tools.] In this learning module, students use a protractor correctly to measure angles. The proper technique for using a protractor is demonstrated in the accompanying...
E-learning for Kids
E Learning for Kids: Math: Riksjas, Toek Toek: Angles
Students will play interactive games to identify types of angles and measure the angles.
E-learning for Kids
E Learning for Kids: Math: Pizza (Italian) Restaurant: Angles I
In this interactive website, students practice various math skills such as identifying different types of angles, use the degree symbol, estimate and measure angles, and construct angles.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Using a Protractor
Q and A Math Forum site that answers the question of "How do I measure angles using a protractor?"
Math Playground
Math Playground: Measuring Angles
Practice measuring angles by manipulating a protractor.
Math Is Fun
Math Is Fun: Using a Protractor
Students learn how to construct and measure angles using a protractor and ruler. The resource consists of a video demonstration and exploration activity.
ClassFlow
Class Flow: Angles Protractor
[Free Registration/Login Required] This flipchart uses the interactive protractor to measure various angles.
Homeschool Math
Homeschool Math: Measuring Angles With a Protractor
This geometry lesson and video explain angle measure, how to measure angles with a protractor, and has varied exercises for the students.