Lesson Plan
EngageNY

Unknown Angle Proofs—Proofs of Known Facts

For Teachers 9th - 10th Standards
Lead the class in a Greek history lesson plan with a geometric twist. Pupils relate a short video about geometric properties to modern-day methods of solving for unknown angles. They discuss parallel line theorems and...
Worksheet
Curated OER

Types of Angles

For Students 10th
In this types of angles worksheet, 10th graders solve 10 different problems that include various types of angles. First, they determine the number of degrees in an angle with two supplementary angles. Then, students determine the value...
Interactive
Curated OER

Angle Measure

For Students 10th
In this geometry worksheet, 10th graders determine the measures of supplementary, complimentary, and vertical angles.  The worksheet also address they proper use of vocabulary when identify angle pairs.  The one page worksheet...
Worksheet
Curated OER

Vertical Angles Worksheet

For Students 9th - 12th
In this vertical angles worksheet, students find the angle measures of 18 angles.  Students use knowledge of vertical and supplementary angles to find the missing angle measures.
Worksheet
Curated OER

Angle Pairs: Vertical Angles

For Students 10th
For this geometry worksheet, 10th graders define vertical angles as it relates to interesting lines. There are 24 problems about solving vertical angles.
Lesson Plan
Curated OER

Geometric Angles

For Teachers 8th - 10th
Students explore angles and their use in Geometry. Students investigate three different kinds of angles: obtuse, acute, and right angles through an online activity. They identify pairs of angles with special relationships: vertical,...
Interactive
CK-12 Foundation

Vertical Angles

For Students 7th - 10th Standards
Examine vertical angles from a different angle. Moving one line in an intersecting pair of lines lets users see relationships between vertical angles. They finish by answering some machine-scored questions on the topic.
Lesson Plan
EngageNY

Angle Problems and Solving Equations II

For Teachers 7th Standards
Demonstrate the application of algebra to geometric angle relationships with an activity that asks learners to use what they know about adjacent and vertical angles to write algebraic equations. Diagrams become more complex in this...
Interactive
CK-12 Foundation

Angles: The Angle of Discovery

For Students 6th - 8th
Practice important angle vocabulary using an interactive lesson. As learners manipulate vertical angles, they watch the supplementary and congruent angles adjust. Questions pertaining to vocabulary and measurements follow their exploration.
Lesson Plan
EngageNY

Unknown Angles

For Students 9th - 10th Standards
How do you solve an equation like trigonometry? Learners apply their understanding of trigonometric ratios to find unknown angles in right triangles. They learn the meaning of arcsine, arccosine, and arctangent. Problems include...
Lesson Plan
EngageNY

Solving for Unknown Angles Using Equations II

For Teachers 7th Standards
The third activity in the series of 29 asks learners to identify types of angles to verify angle relationships. They find unknown measures using vertical, adjacent, complementary, supplementary, and 360-degree angles.
Lesson Plan
EngageNY

Solving for Unknown Angles Using Equations

For Teachers 7th Standards
They say a picture is worth a thousand words—and your pupils may agree after this instructional activity! They read a geometric description and create a diagram from that description. Their diagrams help them find unknown measures based...
Instructional Video11:40
2
2
Flipped Math

Properties of Parallel Lines

For Students 9th - 12th Standards
Work within a parallel universe. Scholars learn about the relationships of angles when two parallel lines are intersected by a transversal. They see how to find the measurements of all eight angles by knowing the measure of one angle....
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...
Lesson Plan
Curated OER

An Introduction to Angles

For Teachers 4th - 8th
Students identify and create angles. In this angle measurement activity, students use sticks to make models of angles, then measure and name each angle.
Worksheet
Curated OER

Pairs of Angles

For Students 10th
In this geometry worksheet, 10th graders determine the measures of various angle pairs:  supplementary, complementary, and vertical angles.  The two page worksheet contains a combination of twelve multiple choice and free...
Worksheet
Curated OER

Properties of Angles, Lines, and Triangles

For Students 10th
In this properties of angles, lines and triangles worksheet, 10th graders solve and complete 28 different problems that include determining the measurement of various figures shown. First, they use the geometric properties and theorems...
Worksheet
Curated OER

Classifying Angles

For Students 10th
In this classifying angles activity, 10th graders solve and complete 21 various types of problems. First, they use the diagram shown on the right to answer the questions that follow. Then, students solve for x and find the measure of...
Lesson Plan
Curated OER

Geometry Lesson 7: Line Segments And Angles

For Teachers 4th
Fourth graders examine and identify line segments and angles using dot paper to draw them. They look at vertical, horizontal, intersecting, parallel and perpendicular lines, draw right angles and angles that are greater than and less...
Interactive
Curated OER

Pairs of Angles Multiple Choice

For Students 9th - 10th
For this pairs of angles worksheet, students answer eight multiple choice questions covering, supplementary, complementary, vertical, and linear angle pairs.  The solutions are available by clicking on the "check your work" button...
Worksheet
Curated OER

Pairs of Angles

For Students 10th
For this pairs of angles worksheet, 10th graders solve 20 different sets of angles. First, they determine each pair of angles as what specified type. Then, students name each pair of specified angles in each illustration.
Worksheet
Curated OER

Angle Relationships

For Students 10th
In this angle relationships worksheet, 10th graders solve 10 different problems that include determining the value of various angle relationships. First, they name a pair of vertical angles and determine which angle is supplementary to a...
Worksheet
Curated OER

Angle Measurements

For Students 10th
In 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 the...
Lesson Plan
Curated OER

Does Your Field Measure Up

For Teachers 9th - 11th
Students measure angles using a plane table kit. In this geometry lesson, students use trigonometric identities to find the values of the length of a football field.

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