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Interactive
CK-12 Foundation

Angle Classification: Angles in the Game of Pool

For Students 6th - 10th Standards
Make a game of angle classification. Using the direction of the pool ball, scholars determine the measure of the created angles. They work to create and classify different types of angles throughout an engaging interactive.
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Interactive
CK-12 Foundation

Angle Classification: Crazy Quilt

For Students 9th - 12th Standards
There's more to a quilt than just a pretty pattern—there's geometry! Explore angle classification using an artistic approach to show your class that quilt designs are really just intricate geometric patterns. Here, scholars create a...
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PPT
Curated OER

Classifying Triangles

For Teachers 5th - 7th
This presentation shows how triangles are classified by angle measurement and length of sides.  It reviews isosceles, scalene, obtuse, right, and acute classifications and includes questions for students to classify some of the...
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Lesson Plan
Curated OER

Simple Angles

For Teachers 3rd
Third graders identify and construct right, acute and obtuse angles and begin to appreciate the degree and unit of measurement of angle. They know the degree value of angles that are simple fractions of a whole turn know that the angle...
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Lesson Plan
Curated OER

Study Buddies: Classifying Triangles

For Teachers 4th - 5th
For 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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Worksheet
Raytheon

Just Measure It

For Students 5th - 7th
In this line segments and angles instructional activity, students solve problem solving problems and multiple choice questions about line segments and angles. Students complete 7 pages of problems.
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Lesson Plan
Curated OER

Poolroom Math

For Teachers 3rd - 4th
Students identify, name, and measure angles using playing pool as a motivator in this activity. They measure, define, and label different angles. They then discuss how their knowledge about angles could be used in a game of pool.
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Worksheet
Curated OER

Identify the Angles

For Students 9th - 11th
In this geometry worksheet, students identify angles using a word bank.  They differentiate between obtuse, acute or right angle.
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Worksheet
Curated OER

Measure, Draw, and Classify Angles: Homework

For Students 7th
In this angles instructional activity, 7th graders review the definitions for a right angle, acute angle, obtuse angle, and straight angle. Students then use symbols to name each angle three different ways. Students classify each angle...
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Lesson Plan
Curated OER

Sorting Angles

For Teachers 4th - 7th
In this sorting angles worksheet, students distinguish the differences between right, obtuse and acute angles. Students determine what type of angle thirteen angles are as shown.
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Lesson Plan
Curated OER

Basic Right Triangles

For Teachers 2nd - 4th
Elementary schoolers examine the attributes of triangles. In this triangle lesson, learners compare regular triangles and right triangles. They explore vertices and angles and investigate obtuse and acute angles. Pupils draw multiple...
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Printables
1
1
Houghton Mifflin Harcourt

Unit 5 Math Vocabulary Cards (Grade 6)

For Students 6th Standards
Acute angle, line of symmetry, and vertex are a few terms you'll find in a set of 90 flashcards designed to reinforce math vocabulary. Included in the set are two types of cards; a word card printed in bold font, and a...
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Printables
K-5 Math Teaching Resources

Triangle Pack

For Teachers 4th - 6th Standards
With so many different types of triangles, it can be a challenge for young mathematicians to keep them all straight. Luckily this set of printable triangles is here to engage children in comparing and sorting triangles by their...
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Worksheet
Curated OER

Acute, Right or Obtuse

For Students 3rd - 4th
In this angles learning exercise, students solve 4 problems in which angles are analyzed and classified as acute, obtuse, or right. No examples are provided.
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Worksheet
Curated OER

Triangles

For Students 4th
In this triangles worksheet, 4th graders study the lengths that are stated for 3 triangles and describe each triangle by its sides. Students describe 3 additional triangles by their angles.
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Worksheet
Curated OER

Triangle Designs

For Students 4th - 6th
In this triangles activity, students draw different triangles and write how many sides and angles each one has. Students draw 4 kinds of triangles and have 2 that are impossible to draw.
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Lesson Plan
Curated OER

Investigation - Adrienne's Pattern Block Angles

For Teachers 5th
Fifth graders investigate possible solutions to a word problem. They explore properties of polygons and right angles. Students demonstrate proper angle measurement. Students discover patterns.
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Worksheet
Curated OER

Angles and Measuring

For Students 10th
Learners identify various angles and how to measure each type. They use a protractor to measure each of the angles. Students also write the name of the angle and identify the number of degrees for each.
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Worksheet
Curated OER

Measuring and Classifying Angles

For Students 6th
In this measuring and classifying angles worksheet, 6th graders select the type of angle (acute, right, obtuse, straight) for 6 drawings, then use a protractor to measure each angle.
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Worksheet
Curated OER

Angles Measure and Classify

For Students 5th - 6th
In this angles instructional activity, students solve 6 problems in which an angle is measured with a protractor. Students mark if the angle is acute, right, obtuse or straight.
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Lesson Plan
Curated OER

An Introduction to Angles

For Teachers 4th - 8th
Students identify and create angles. In this angle measurement lesson, students use sticks to make models of angles, then measure and name each angle.
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Printables
1
1
Houghton Mifflin Harcourt

Unit 6 Math Vocabulary Cards (Grade 5)

For Students 5th Standards
Acute angles, nets, and vertices are only a few terms that a set of flash cards includes. Among the 108 cards, two types are available; word cards printed in bold-faced lettering, and corresponding definition cards equipped with an...
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Lesson Plan
EngageNY

Angle Sum of a Triangle

For Students 8th Standards
Prove the Angle Sum Theorem of a triangle using parallel line and transversal angle relationships. Pupils create a triangle from parallel lines and transversals. They find angle measures to show that the angles of a triangle must total...
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Lesson Plan
Curated OER

8th Grade Math Parallel and Transversal Lines

For Teachers 8th
Eighth graders label and define geometrical lines and angles. They identify angles on the board as acute, obtuse, straight, or right. In groups, 8th graders build with masking tape on the wall a pair of parallel lines, and a transverse...

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