Complementary Angles Teacher Resources

Find Complementary Angles lesson plans and worksheets
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Complementary and Supplementary Angles: Geometry "Nspired"

For Teachers 4th - 8th
Learners investigate complementary and supplementary angles. They use dynamic geometry (TI-nspire) software to manipulate rays to identify the conditions necessary to create complementary and supplementary angles.  They find the measure...
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Geometry - Angles Overview

For Students 7th - 8th
Learners address 14 questions that include naming all pairs of opposite and supplementary angles for sets of intersecting lines and then, finding the measure of the unknown angle. They determine the measure of the angle that is...
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Angle Pairs - Reteach 14.2

For Students 4th - 5th Standards
Practice recognizing types of additive angles with a instructional activity in which pupils review adjacent, interior and exterior, complementary, and supplementary angles and use a diagram to give examples of them. Be aware that the...
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Leveled Problem Solving: Angles

For Students 4th - 6th Standards
This splendid assignment gets future engineers to compute complementary or supplementary angles in real-life applications! Once they have mastered the art of additive angles, they can apply their knowledge to help Steve, Inez, Carlotta,...
1 In 1 Collection 7:46
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Angle Basics

For Students 4th - 8th Standards
Take a linear approach to acquaint the class with angles. The video introduces the idea of angles from the notion of intersecting lines. Using the idea of perpendicular lines, the resource defines right, acute, and obtuse angles along...
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Complementary and Supplementary Angles #1

For Students 4th - 6th Standards
Learners are given one angle measure, and then determine the corresponding supplementary or complementary angle. A reference web site is given for additional activities. This assignement can be adapted to demonstrate that angle measure...
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Supplementary, Complementary, and Vertical Angles

For Teachers 4th - 6th Standards
By using circles that they cut out and label themselves, learners literally "get a grip" on the angles they identify: supplementary, complementary, and vertical. They solve missing measurements based on properties of supplementary,...
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Transversals and Angles - Homework 14.3

For Students 5th - 8th
Upper graders and middle schoolers use a diagram to give examples vertical angles, alternate interior angles, and alternate exterior angles, find the degree measure of multiple angles, and draw and label a pair of complementary vertical...
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Angles (Complementary and Supplementary)

For Students 4th - 8th Standards
Young geometers solve 12 problems in which they must calculate the measurement of an unknown angle that is either complementary or supplementary to a known angle. Three examples are provided. You will appreciate that practice is very...
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Finding an Unknown Angle

For Teachers 4th - 6th Standards
Teach your class how to apply their knowledge of geometry as they explore the unknown. In order to find an unknown angle, students must understand that rectangles have four interior right angles, that right angles have 90 degrees, and...
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Transversals and Angles - Problem Solving 14.3

For Students 4th - 8th
Upper-elementary and secondary learners use maps to solve word problems showing measurements of angles. They write an expression describing a relationship and identify and label pairs of alternate exterior angles. Pupils solve four...
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Systems-Angle Problems

For Students 10th
For this geometry worksheet, 10th graders use systems of linear equations to solve word problems which involve supplementary and complementary angles.  The one page worksheet contains ten problems.  Answers are not provided. 
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How Do You Pay a Complement to an Angle?

For Teachers 9th - 12th
Students observe and solve examples of the complementary angle theorem. They complete the How Do You Pay a Complement to an Angle worksheet, and write a response in their math journal.
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Hypatia: Angles

For Teachers 6th - 7th
Introduce your young geometers to Hypatia, the first noted Greek female mathematician, and the properties of angles. Though this resource is missing worksheets that are needed to complete the instructional activity, the structure is...
3:14
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Complementary, Supplementary, and Vertical Angles

For Students 6th - 10th
You're such a great resource, said the complementary angle. A short video in the Socratica Geometry playlist describes complementary, supplementary, and vertical angles. It also shows how to calculate the other angle in a supplementary...
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Solving Problems with Angles

For Students 4th - 6th
Upper elementary math whizzes complete word problems having to do with measurements of angles. They complete 10 multiple choice problems.
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Geometry: Angle Relationships

For Teachers 6th - 8th
Learners identify angles by naming them four ways (angle symbol, initials, number, or letter). They identify types of angles on a SMART Board presentation. They slide adjacent and vertical angles to determine equivalency.
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Supplementary, Complementary, And Vertical Angles

For Teachers 8th - 10th
Middle and high schoolers construct parallel lines cut by a transversal using the Geometer's Sketchpad. They measure angles formed, compare angle measurements, explore various activities on Geometer's Sketchpad, and complete a worksheet.
3:34
Lesson Planet

How Do You Find a Missing Angle in a Right Triangle?

For Teachers 6th - 8th
The triangle sum theorem states that the interior angles of a triangle add up to 180 degrees. So it seems logical that if there are two known values given for the interior angles of a triangle, the third value could be found using this...
3:40
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How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?

For Teachers 6th - 8th
Given an isosceles triangle, and the value of one angle, find the missing values. There are some special properties about isosceles triangles. Use the triangle sum theorem to solve this problem. Watch this video to see how the instructor...
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Complementary and Supplementary Angles #3

For Students 4th - 6th
Learners are given one angle measurement and determine either the corresponding supplementary or complementary angle measurement. A reference web site is given for additional activities.
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Sine and Cosine

For Students 9th - 12th Standards
What is the complementary relationship between sine and cosine? Using a right triangle, pupils explain why the sine of one acute angle is equal to the cosine of the other. The triangle measurements are given as variables.
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Angles

For Students 10th
In this angles worksheet, 10th graders solve and complete 22 different problems that include identifying various types of angles. First, they use the terms adjacent angles, linear pair, or neither to describe angles shown. Then, students...
Lesson Planet

Complementary and Supplementary Angles

For Students 10th
In this complementary and supplementary angles worksheet, 10th graders solve and complete 23 various types of problems. First, they supply a reason to justify each statement in the given sequences. Then, students find the measure of each...

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Complementary Angles