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Worksheet
Curated OER

Linear Pair Worksheet

For Students 9th - 11th
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.
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Worksheet
Curated OER

Corresponding Angles

For Students 7th - 9th
For this corresponding angles worksheet, students identify corresponding angles and determine their angle measurement.  This two-page worksheet contains 6 problems.  Answers are provided on the last page.
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Lesson Plan
EngageNY

Sine and Cosine of Complementary Angles and Special Angles

For Students 9th - 10th Standards
Building trigonometric basics here will last a mathematical lifetime. Learners expand on the previous instructional activity in a 36-part series by examining relationships between the sine and cosine of complementary angles. They also...
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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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Lesson Plan
EngageNY

Similarity and the Angle Bisector Theorem

For Teachers 9th - 10th Standards
Identifying and verifying reproducible patterns in mathematics is an essential skill. Mathematicians identify the relationship of sides when an angle is bisected in a triangle. Once the pupils determine the relationship, they prove it to...
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Lesson Plan
EngageNY

Unknown Angle Proofs—Proofs with Constructions

For Teachers 9th - 10th Standards
Provide your emerging mathematicians with the tools to learn as they incorporate auxiliary lines to solve unknown angle proofs in this continuing segment. They decipher information from a diagram to uncover the missing pieces and...
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Lesson Plan
EngageNY

Congruence Criteria for Triangles—AAS and HL

For Students 9th - 10th Standards
How can you prove it? Guide classes through an exploration of two possible triangle congruence criteria: AAS and HL. Learners connect this criteria to those previous learned and also explore criteria that does not work. The lesson...
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Interactive
CK-12 Foundation

Conversion between Degrees and Radians: Clock Angles and Measures

For Students 10th - 12th Standards
It's 3:30, what radian is it? Pupils create clock angles on a clock and determine the radian measure to the minute hand. They then use a conversion factor to convert from one measurement to another.
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Lesson Plan
EngageNY

Unknown Angle Problems with Inscribed Angles in Circles

For Teachers 9th - 10th Standards
We know theorems about circles—now what? Class members prove a theorem, with half the class taking the case where a point is inside the circle and half the class taking the case where a point is outside the circle. The lesson then...
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Interactive
CK-12 Foundation

Complementary Angles: Corner Kick

For Students 7th - 10th Standards
Soccer is all about angles. Young mathematicians use an interactive to correctly position the path of a soccer ball so that it reaches the goal. They consider complementary angles when answering a set of challenge questions.
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Interactive
CK-12 Foundation

Complementary Angles

For Students 7th - 10th Standards
Here's an interactive that complements your lesson plans. Users of the resource adjust one of the angles in a complementary set to see how it affects the other. A set of challenge questions assesses understanding.
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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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Lesson Plan
Curated OER

Determining Angle Measure with Parallel Lines

For Teachers 9th - 12th
Students observe and solve examples of corresponding angle postulates, alternate interior angle theorems, and exterior and consecutive angles. They complete the Determining Angle Measure With Parallel Lines worksheet.
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Worksheet
Curated OER

Measuring Angles in Triangles

For Students 10th
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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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
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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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
For this angles worksheet, 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 but can...
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Lesson Plan
Curated OER

Angles: Angles, Angles, Everywhere

For Teachers 6th - 8th
Students practice estiminating and measuring angles. After watching a short video, they identify angles in objects in the classroom and their homes. In groups, they participate in activities in which they are given a scenerio and are...
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Worksheet
Curated OER

Angles and Angle Measure

For Students 10th - 12th
In this trigonometry activity, learners 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 worksheet in which learners solve 12 word problems that require them to calculate the measure of angles.
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Lesson Plan
Curated OER

Angle Relationships

For Teachers 10th
Tenth graders explore the angle relationships that exist when two lines intersect. In this geometry lesson, 10th graders estimate the measure of given angles and use their graphing calculator tools. Students use this knowledge to find...
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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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