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Lesson Plan
Illustrative Mathematics

Sum of Angles in a Polygon

For Teachers 8th - 12th Standards
How can learners use algebra to solve a geometry problem? Help learners create an equation that shows the relationship between the number of sides of a polygon and the sum of the interior angles. Students are asked to divide the...
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Workbook
1
1
University of Utah

Geometry: Angles, Triangles, and Distance

For Students 8th Standards
The Pythagorean Theorem is a staple of middle school geometry. Scholars first investigate angle relationships, both in triangles and in parallel lines with a transversal, before proving and applying the Pythagorean Theorem.
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Worksheet
Curated OER

Complementary and Supplementary Angles

For Students 4th - 7th
Your geometry learners determine the measure of remaining angles in sets of three given that the other two are complementary or supplementary. From a diagram, they identify which angles are supplementary, complementary or congruent from...
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Worksheet
Curated OER

Protractor #5

For Students 4th - 6th
For this measuring angles worksheet, students measure a set of angles, then check the appropriate measure and name of each. A reference web site is given for additional activities.
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Worksheet
Curated OER

All Angles (A)

For Students 7th - 10th
In this measuring angles review worksheet, students use their math skills to solve 6 problems that require them to estimate and measure each of the 6 angles.
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Worksheet
Curated OER

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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Worksheet
Curated OER

Relationship between Exterior and Remote Interior Angles in a Triangle

For Students 9th
In this triangle worksheet set, 9th graders find the relationship between the exterior and remote interior angles in triangles. They determine the formula, and apply it in 15 problems. They use a compass as needed to measure angles.
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Worksheet
Curated OER

Angle Sum of Triangles and Quadrilaterals

For Students 9th - 12th
In this angle sum worksheet, students find missing angles of 20 triangles and quadrilaterals.  Students find the missing angle in each polygon by using the total degrees of each and given angle measures.
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Worksheet
Curated OER

Linear Pair Worksheet

For Students 9th - 11th
In this linear pair learning exercise, students use the linear pair theorem to calculate missing angle measurements.  This two-page learning exercise contains 6 problems.  Answers are provided on the last page.
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Worksheet
Curated OER

Corresponding Angles

For Students 7th - 9th
In this corresponding angles activity, students identify corresponding angles and determine their angle measurement.  This two-page activity contains 6 problems.  Answers are provided on the last page.
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Assessment10:41
Mathed Up!

Angles: Parallel Lines

For Students 9th - 11th Standards
Viewers are presented with seven problems with parallel lines and angle relationships and must use the given information to find the measures of specific angles. To finish, they explain their process in finding the measures in the problems.
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Lesson Plan
Willow Tree

Angles Formed by Transversals of Coplanar Lines

For Students 8th - 11th Standards
Create a strong understanding of the relationships formed when parallel lines intersect a transversal. Discuss each type of angle pair and their relationship to each other. 
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Worksheet
Curated OER

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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Worksheet
Curated OER

Measuring Angles in Triangles

For Students 10th
In this measuring angles in triangles worksheet, 10th graders solve 12 different measurement problems with angles within triangles. First, they find the value of x in each triangle given the angle measurements. Then, students find the...
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Worksheet
Curated OER

Measuring Angles

For Students 10th
In this measuring angles worksheet, 10th graders solve and complete 8 various types of problems. First, they use a protractor to find the measure of each angle shown. Then, students find the missing angle measures. They also refer to the...
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Worksheet
Curated OER

Angle Measurements

For Students 10th
In this angle measurements learning exercise, 10th graders solve 12 problems that refer to the illustrations on the sheet and find the measures of various types of angles. First, they refer to the first figure to respond to 6 questions...
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Worksheet
Curated OER

Measuring Angles with a Protractor

For Students 7th - 8th
In this measuring angles worksheet, students solve and complete 3 various types of problems. First, they complete each statement by measuring each angle shown. Then, students measure all three angles in a triangle and add them.
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Worksheet
Curated OER

Angles on a Line and on a Point

For Students 6th - 7th
In this angles learning exercise, students solve 24 problems pertaining to angle measurements on a line and on a point. There are also calculations of adjacent angles and supplementary angles. The page is intended as an online activity...
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Worksheet
Curated OER

Angles and Angle Measure

For Students 10th - 12th
In this trigonometry activity, students convert between degrees and radians. They use the unit circle to identify the measure of angles. There are 28 questions with an answer key.
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Worksheet
Curated OER

Complimentary and Supplementary Angles #2

For Students 4th - 6th
Here is a complimentary and supplementary angles instructional activity in which learners solve 12 word problems that require them to calculate the measure of angles.
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Worksheet
Curated OER

Angle Measurement

For Students 10th
In this angle measurement worksheet, 10th graders solve 24 different problems related to determining the measurement of various angles. First, they define the various ways to measure an angle and define the type of angle that it is....
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Worksheet
Curated OER

Angle Measurement 2

For Students 10th
In this angle measurement worksheet, 10th graders solve 24 problems that include determining the measurement of various angles. First, they define each angle and the specific type that is shown in each. Then, students determine the...
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Handout
Charleston School District

Similar Triangles

For Students 8th Standards
Are they similar? The lesson provides an explanation of the angle-angle criterion for triangle similarity. Several problems allow the class to determine whether the two triangles with the given angle measures are similar or not. 
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Worksheet
Curated OER

Using Trinonometry to Find Angle Measures

For Students 10th - 12th
In this trigonometric ratios worksheet, students find the missing angle of 20 triangles by using sine, cosine and tangent ratios. Students compute the angle measurement of given ratios for six problems.

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