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Interactive
Curated OER

Measuring Angles - Pretest Questions

For Students 4th - 6th
Upper graders solve ten multiple choice problems about angles and measuring angles.
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Lesson Plan
Curated OER

Geometric Properties

For Teachers 9th - 12th
Students find triangular angles using the angle theorem. In this geometry lesson, students describe labeled triangles, use the pythagorean theorem, and rewrite information about triangles in standard form.
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Lesson Plan
Curated OER

Lines and Angles with K'NEX

For Teachers 6th - 8th
Here is a geometry lessonwhich invites learners to create models using their knowledge of lines, segments, rays, and angles. This lesson reinforces geometric vocabulary and concepts through practical application, it also includes...
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Interactive
CK-12 Foundation

Pythagorean Theorem to Classify Triangles: Missing Angles

For Students 8th - 12th Standards
Learn to use the Pythagorean Theorem with non-right triangles. Pupils use the interactive to discover the relationship between the lengths of sides for acute and obtuse triangles. They compare the squares of the sides of the triangles to...
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Interactive
CK-12 Foundation

Angle Classification: Angle Exploration

For Students 7th - 10th Standards
Acute or obtuse? Seems right to me! As scholars explore the simulation, they investigate angle measures. Questions ask them to classify the angles using correct naming conventions.
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Worksheet
Curated OER

Identify the Angles

For Students 5th - 7th
In this angle review worksheet, students examine 4 angles and identify each of them as acute, right, obtuse, or straight angles.
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Worksheet
Curated OER

Identify Angles: Obtuse, Right, Straight and Acute

For Students 5th - 6th
In this triangle worksheet, students identify angles as either obtuse, right, straight or acute. A reference web site is given for additional activities.
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Worksheet
Curated OER

Measuring Angles

For Students 10th
Solve and complete 18 problems about angles. First,  demonstrate that each conjecture is false by giving a counterexample. Then write the inverse, contrapositive, and converse for the each statement. In addition, write a biconditional...
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Worksheet
Houghton Mifflin Harcourt

Lines, Line Segments, Rays, and Angles - Practice 15.1

For Students 3rd - 5th Standards
Is it a line, line segment, ray, or angle? Identifying geometric figures is the focus. In addition to identification, learners recognize right angles or tell if an angle is less than or greater than a right angle. They tell if lines are...
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PPT
Curated OER

Angles

For Teachers 3rd - 4th
A professional-looking presentation focuses on measuring angles.. Each of the slides requires learners to calculate the measurement of an angle that's created by two intersecting lines. The key is to remember that angles on a straight...
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PPT
Curated OER

Angles

For Teachers 3rd - 5th Standards
Here is a well-designed presentation on different types of angles for your young geometers. In it, learners view slides that clearly illustrate what these angles are, and how they are formed. Excellent practice when introducing these...
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Worksheet
Curated OER

Acute and Obtuse Angles

For Students 3rd - 5th
For this angles worksheet, students label a set of 4 angles as either acute or obtuse. Page has several links to additional geometry activities.
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Lesson Plan
Curated OER

Hey! What Is Your Angle?

For Teachers 5th
Fifth graders create and classify straight, right, acute and obtuse angles. In this clever lesson, 5th graders utilize pretzel sticks to form different types of angles. Best of all, they get to eat them at the end!
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Lesson Plan
Curated OER

South Caro-angular

For Teachers 9th - 12th
Students classify and measure angles.  In this angular instructional activity, students measure, contruct, and classify angles.  They identify angles as acute, right, obtuse, and straight. 
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Lesson Plan
Curated OER

Angle Action

For Teachers 6th
Sixth graders investigate the concept of an angle. They classify an angle according to its type. The lesson has students practice with acute, right, and obtuse angles. A unique part is when telling time using clock hands is related to...
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Lesson Plan
Curated OER

Measure the Angle

For Teachers 7th - 9th
Young scholars measure angles.  In this angle instructional activity, students draw angles.  They  use a protractor to measure angles and identify the angle as straight, right, acute, or obtuse. 
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Worksheet
Curated OER

Exploring Angles

For Students 10th
In this exploring angles worksheet, 10th graders solve 6 various problems of geometry by identifying various types of angles. First, they use the figure shown to list all the angles that have W as the vertex and then, name the straight...
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Worksheet
Curated OER

Angles Identification

For Students 3rd - 5th Standards
In this assignment, math whizzes identify angles as either being obtuse, acute, right, or straight. Students identify six angles. The publisher states that this is designed with CCSS.Math.Content.MD.6 in mind, but it really does not ask...
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Worksheet
Curated OER

Types of Angles

For Students 7th - 9th
In this angles worksheet, students identify types of angles.  They describe a given angle as acute, obtuse, right, straight or reflexive.  This two-page worksheet contains 9 problems.  Answers are provided on the last page.
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Worksheet
Curated OER

Exploring Angles

For Students 10th
In this exploring angles worksheet, 10th graders solve 12 various types of problems that are related to measuring various angles. First, they name the vertex of an angle and determine whether it appears to be acute, obtuse, right, or...
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Worksheet
Curated OER

Classifying and Measuring Angles

For Students 10th
In this classifying and measuring angles worksheet, 10th graders solve and complete the measures of various types of angles. They determine whether each angle drawn is a straight, right, obtuse, acute, or reflex angle. Then, students...
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Lesson Plan
Curated OER

What's Your Angle

For Teachers 6th - 7th
In this angle worksheet, students identify five shapes and then place them together to form a square. Afterward, they answer three questions regarding the number of right, acute and obtuse angles. This one-page worksheet contains a total...
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Worksheet
Curated OER

Identify Triangles: Acute, Right, Obtuse, Straight

For Students 5th - 6th
In this triangles worksheet, students draw angles with given measurements and identify each as either acute, right, obtuse or straight. A reference web site is given for additional activities. 
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Lesson Plan
Curated OER

Study Buddies: Classifying Triangles

For Teachers 4th - 5th
In this math worksheet, students analyze an informative chart about the measurement and angles of equilateral, isosceles and scalene triangles. Students then answer 5 questions about classifying triangles.

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