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: Estimate the Angle
Practice estimating the angle by sliding the blue "X" button up and down to open and close the angle. See how many aliens you can zap with the correct answer. Your total correct out of 10 is listed just below the problem.
McGraw Hill
Glencoe: Self Check Quizzes 2 Angles
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of angles. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It"...
Texas Instruments
Texas Instruments: Drawing and Measuring an Angle
Students learn to use drawing and measurement tools to measure angles. They explore and review types of angles as their measurements are altered.
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.
Illustrative Mathematics
Illustrative Mathematics: F Tf.1 What Exactly Is a Radian?
For this task, students use a piece of string or another tool to measure the radius of the circle and then mark off the corresponding arc length on the unit circle as many times as they need to for 0, 1, 2, 3, 4, 5, and 6 radians. They...
E-learning for Kids
E Learning for Kids: Math: Russian Toy Store: Angles Ii
Students will play learning games to explore triangles, angles, and angle measurement.
Texas Instruments
Texas Instruments: Collecting Data in Geometry
This activity is designed for students to make conjectures about triangles. Students will create three lists to represent the measures of the angles of the triangle. The entire class list will then be sent to each student for analysis,...
Texas Instruments
Texas Instruments: Cabri Geometry Tour
In this activity, students use the Cabri software to mark points, draw lines, construct parallel and perpendicular lines, angles, bisectors, and triangles. They learn how to use the tool to measure angles.
Texas Instruments
Texas Instruments: Eating Out
In this activity, students examine data and make graphs to represent the data. They interpret the data and answer questions. They also learn to calculate percentages and angle measures.
Texas Instruments
Texas Instruments: Parallel Lines Cut by a Transversal With Cabri Jr.
Using Cabri Jr, the students (with the teachers help) will create parallel lines cut by a transversal, measure angles, and compare the relationships of the angles formed using features of the Cabri Jr.
Texas Instruments
Texas Instruments: Real Life Real World Activity Surveyor
Surveyors describe land parcels with distance and angle measurements, often given as compass headings. Once the boundaries of the land parcel are described, the surveyor can calculate the area of the land. This activity uses Cabri Jr....
Khan Academy
Khan Academy: Radians and Degrees
Convert angle measures given in degrees to radians and vice versa. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
![Arts Now Learning: A Perfect Sacred Sphere [Pdf] Lesson Plan](https://static.lp.lexp.cloud/images/attachment_defaults/resource/large/FPO-knovation.png "Arts Now Learning: A Perfect Sacred Sphere [Pdf] Lesson Plan")
ArtsNow
Arts Now Learning: A Perfect Sacred Sphere [Pdf]
In this lesson plan, 4th graders will explore protractors, rulers, balance both radial, and symmetrical, and concepts of angle measurements as they create their own mandalas.
University of Regina (Canada)
University of Regina: Math Central: Interior Angle Measure of a Polygon
This is a question response page from the University of Regina where you will find an algorithm for finding the number of degrees of any convex polygon.
University of Regina (Canada)
University of Regina: Math Central: Interior Angle Measure of a Polygon
This is a question response page from the University of Regina where one may find an algorithm for finding the number of degrees of any convex polygon.
The Math League
The Math League: Measuring Angles
This tutorial gives some examples of angles and their degree measurements.
Texas Instruments
Texas Instruments: Measuring Polygons an Introduction to Cabri Jr.
This activity is designed as an introduction to using the Carbri Jr. application on the TI-83+/84+ calculators. Students are guided through the menu system and are shown how to draw triangles, quadrilaterals and and a pentagon. Perimeter...
OER Commons
Oer Commons: Pre Assessment
Students solve for missing angle measures by applying what they have learned about types of angles and the angle measures of polygons. Students do a pre-assessment at the end of the lesson.
BBC
Bbc: Angles
You can pick up some valuable pointers on angles and lines here. When you finish working your way through the pages you can take an on-line "Test Bite," and check your understanding.
Khan Academy
Khan Academy: Angle Basics
Determine which angle has a greater measure by looking at the size of the opening between the angle's rays. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Interactive Mathematics
Interactive Mathematics: Values of Trigonometric Functions
How do you determine the value f a trig function? Find the answer here. This tutorial shows how to find trig values from 45-45-90 and 30-60-90 triangles, as well as how to use the calculator to find both trig values and angle measures.
Khan Academy
Khan Academy: Decompose Angles
Find an angle's measure when given the measures of its parts. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
University of Regina (Canada)
University of Regina: Math Central: Interior Angle Measure of a Polygon
This is a question response page from the University of Regina where you will find an algorithm for finding the number of degrees of any convex polygon.
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