Illustrative Mathematics
Sum of Angles in a Polygon
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...
Curated OER
Complementary and Supplementary Angles
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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Measuring Angles
In this math worksheet, students use protractors to measure each of a set of angles. This is a worksheet generator, the teacher controls the minimum and maximum angles students are presented with as well as whether or not to rotate...
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Angles in a Straight Line
In this online math worksheet, students calculate the value of a variety of angles based on a geometric design. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A...
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Measurements of Unknown Angles
In this geometry skills practice instructional activity, students respond to 9 questions that require them to calculate the measurements of the unknown angles.
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Angle Measures-90, 180, 270 and 360 Degrees
In this angle measurement worksheet, students complete 4 multiple choice problems, determining whether given angles measure 90, 180, 270 or 360 degrees. A reference web site is given for additional activities.
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Solving Problems with Angles
Upper elementary math whizzes complete word problems having to do with measurements of angles. They complete 10 multiple choice problems.
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Relationship between Exterior and Remote Interior Angles in a Triangle
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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Angle Sum of Triangles and Quadrilaterals
In this angle sum instructional activity, 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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Linear Pair Worksheet
For this linear pair worksheet, students use the linear pair theorem to calculate missing angle measurements. This two-page worksheet contains 6 problems. Answers are provided on the last page.
EngageNY
Writing and Solving Linear Equations
Incorporate geometry into the solving linear equations activity. Pupils use their knowledge of geometry to write linear equations which reinforces geometry measurement concepts while at the same time providing a familiar context for...
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Measure and Draw Angles
Six word problems provide practice for young geometers to review angles, the angle a of straight line, circles, right angles, and others. I like the approach of these questions; they require thinking and explaining, not just computation.
Mathed Up!
Bearings
Keep the math straight and true. Using information learned about angle relationships, pupils determine drawn bearings, or draw a line with a given bearing. The accompanying video provides the definition of a bearing and its three...
Mathed Up!
Pie Charts
Representing data is as easy as pie. Class members construct pie charts given a frequency table. Individuals then determine the size of the angles needed for each sector and interpret the size of sectors within the context of frequency....
West Contra Costa Unified School District
Law of Sines
One must obey the sine laws. A lesson introduces and derives the Law of Sines for non-right triangles. With examples that use the Law of Sines to determine unknown measures in triangles, the lesson checks to see if the Law of Sines also...
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Measuring Angles in Triangles
In this measuring angles in triangles activity, 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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Measuring Angles
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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Angle Measurements
For this angle measurements worksheet, 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 about...
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Measuring Angles with a Protractor
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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Rectangle: Angle and Lengths
In this quadrilateral worksheet, students determine the measures of angles and their side lengths of a rectangle. There are 15 questions with multiple parts.
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Angles at a Point
In this angles worksheet, students find the measurement of missing angles. They identify complimentary, supplementary and vertical angles. This one-page worksheet contains 4 problems. Answers are provided.
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Complimentary and Supplementary Angles #2
Here is a complimentary and supplementary angles worksheet in which learners solve 12 word problems that require them to calculate the measure of angles.
West Contra Costa Unified School District
What Is a Radian?
Here's an algebra II activity that strives to make the concept of a radian less abstract and more conceptual. It takes a hands-on approach to exploring the idea of a radian and allows individuals to develop a definition of a radian...
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Angle Measurement
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....