Activity
Math Medics

S.o.s. Math: Measure of an Angle

For Students 9th - 10th Standards
This lesson gives a tutorial on the measure of an angle. Includes sample problems and solutions.
Activity
BBC

Bbc: Bitesize: Ks2: Maths: Shape, Space, and Measurement

For Students 3rd - 5th
Interactive lessons featuring 2-D and 3-D shapes, angles, time, and symmetry. For each section, play a learning game, read a lesson that includes comprehensive vocabulary, and take a quiz to find out what you've learned.
Activity
Homeschool Math

Homeschool Math: Triangles

For Students 3rd - 8th Standards
This lesson plan provides students with an opportunity to practice drawing and measuring triangles and angles. It also shows pictures and gives definitions of each type of angle and triangle.
Activity
University of Georgia

University of Georgia: Arcs, Central Angles, Arc Length & Sector Area

For Teachers 9th - 10th Standards
This site provides practice problems for calculating central angles and calculating arc length.
Activity
Math Open Reference

Math Open Reference: Constructions

For Students 9th - 10th Standards
Learn about drawing shapes using only a compass and straight edge or ruler with out measuring any lengths or angles.
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Math Challenges for Families

For Students 2nd - 8th
Students, teachers, and parents alike will enjoy this challenging math site. It contains a clever brain teaser section plus creative problems related to algebra, geometry, measurement, numbers, statistics, and probability. A Spanish...
Activity
Lawrence Hall of Science

The Math Page: Trigonometry: Measurement of Angles

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains many topics regarding measurement of angles, including standard position, degree measure, and coterminal angles. There are example problems solved, problems for the student to attempt,...
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Khan Academy

Khan Academy: Draw Angles

For Students 4th - 5th Standards
Practice constructing angles given the degree measure.
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Khan Academy

Khan Academy: Find Angles in Triangles

For Students 7th - 8th Standards
Find missing angle measures using the properties of triangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Unit Plan
Khan Academy

Khan Academy: Draw Angles

For Students 3rd - 5th Standards
Use a protractor to construct angles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
Khan Academy

Khan Academy: Constructing Angles Review

For Students 4th Standards
Review constructing angles with a protractor, then try constructing some of your own.
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Khan Academy

Khan Academy: Find Angles in Congruent Triangles

For Students 9th - 10th Standards
Given two triangles, determine whether they are congruent and use that to find missing angle measures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Website
PBS

Pbs Learning Media: What's a 360?

For Students 3rd - 8th Standards
In this Cyberchase video segment, Harry tries to snowboard and learns how to measure and identify many common angles.
Lesson Plan
University of Regina (Canada)

University of Regina: Math Central: Atlatl Lessons Grades 4 12

For Teachers 9th - 10th Standards
What is an atlatl? Learn how this Aztec dart throwing tool can be used to teach students such things as distance, radius, and linear and angular velocity. Curriculum strands are provided for each of the many lesson plans for students...
Activity
Lawrence Hall of Science

The Math Page: Trigonometry: Radian Measure

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains the radian measure of angles. There are example problems solved, problems for the student to attempt, and answers to the student problems.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Dojo: Area, Measurement, and Angle

For Students 4th - 6th Standards
Students will play learning games to explore area, measurement, and angles.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Riksjas, Toek Toek: Angles

For Students 4th - 5th Standards
Students will play interactive games to identify types of angles and measure the angles.
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Measurement: Tools of Measurement

For Students 2nd - 7th Standards
A slideshow, a karaoke song to sing along to, and a short multiple-choice quiz on the topic of measurement and the tools that can be used to measure things, depending on the purpose, e.g., temperature, length, mass, angle, time, etc.
Lesson Plan
Better Lesson

Better Lesson: What Angles Are on a Bat House?

For Teachers 3rd
Third graders are preparing to build bat houses. They have calculated surface area, identified nail placement, and will now collect data on angle types in this real-world activity.
Handout
Khan Academy

Khan Academy: Angle Basics Review

For Students 4th
Review what an angle is and how an angle is measured.
Unit Plan
Khan Academy

Khan Academy: Challenge Problems: Inscribed Angles

For Students 9th - 10th Standards
Solve two challenging problems that apply the inscribed angle theorem to find an arc measure or an arc length.
eBook
Math Planet

Math Planet: Geometry: Angles

For Students 9th - 10th Standards
Angles are explained through examples and a video lesson. [0:48]
Activity
University of Cambridge

University of Cambridge: Maths and Sports: Olympic Turns

For Students K - 1st Standards
What angles can you see in these photos of Olympic sports? Can you estimate them? This challenging activity is aimed at older primary pupils at Key Stage 2.
Unit Plan
Wolfram Research

Wolfram Math World: Tetrahedron

For Students 9th - 10th
This math site defines a tetrahedron, gives reference to the Platonic solid, and gives views from varying perspectives. It also provides formulas for veritices of a tetrahedron lieing along the the positive X axis, formulas for area,...