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3rd Grade Classifying Angles (Oklahoma) Worksheets

3rd Grade Classifying Angles: sort angles in shapes as acute, right, obtuse or straight. Every worksheet is free, prints as a PDF with an answer key, and can be assigned online. The ones teachers open most are first.

← All 3rd grade topics 3.GM.1.3

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3rd Grade Classifying Angles (Oklahoma) Worksheets - Determining Visually worksheet

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Determining Visually

4g1

Student objectives

Identify whether an angle is acute, right, obtuse, or straight by looking at it.
Compare an angle to a right angle as a quick visual benchmark.
Notice when an angle is smaller than 90°, exactly 90°, between 90° and 180°, or exactly 180°.
Use the shape and direction of the rays to classify angles even when they are rotated.

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3rd Grade Classifying Angles (Oklahoma) Worksheets - Determining 90 Angle worksheet

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Determining 90 Angle

4g1

Student objectives

Decide whether an angle shown is a right angle (90°).
Tell the difference between right angles and angles that are smaller (acute) or larger (obtuse).
Recognize that perpendicular lines meet to make a 90° angle.

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3rd Grade Classifying Angles (Oklahoma) Worksheets - Determining Angles in Shapes worksheet

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Determining Angles in Shapes

4g1

Student objectives

Spot and name acute, right, and obtuse angles in different shapes.
Count how many of each type of angle a shape has.
Use the corners (vertices) of a polygon to decide where the angles are.

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3rd Grade Classifying Angles (Oklahoma) Worksheets - Finding a Shape by Its Angles worksheet

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Finding a Shape by Its Angles

4g1

Student objectives

Classify the angles inside a polygon as acute, right or obtuse
Judge a whole shape by the mix of angles it contains
Recognize that a shape can hold all three kinds of angle at once
Rule out a shape by finding the kind of angle it is missing

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More 3rd grade topics

Multiplication Facts 30 Understanding Fractions 20 Adding & Subtracting 22 Understanding Multiplication & Division 17 Comparing Fractions 7 Graphs & Line Plots 12 Time & Elapsed Time 20 Counting Money 12 Number Properties & Missing Numbers 16 Multiplying by One Digit 6 Patterns & Function Tables 17 Measuring Length & Temperature 13 Area & Perimeter 7 Rounding & Estimating 7 Place Value to 100,000 23 Solid Figures & Unit Cubes 6

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