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OAS 4.GM.2.1 Worksheets

OAS 4.GM.2.1 (Oklahoma, 4th Grade): "Measure angles in geometric figures and real-world objects with a protractor or angle ruler." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.

Geometry & Measurement (GM) 4.GM.2 Recognize and measure attributes in real-world and mathematical situations using various tools. 4.GM.2.1Measure angles in geometric figures and real-world objects with a protractor or angle ruler.

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4.GM.2.1

OAS 4.GM.2.1 Worksheets - Creating Angles worksheet

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Creating Angles

4md6

Student objectives

Use a protractor correctly by lining up the center point and the baseline with a ray.
Draw an angle with a given number of degrees by marking the correct spot on the protractor and drawing the second ray.
Read degree measurements on a protractor, including choosing the correct scale.
Label the vertex and rays of an angle and name the angle you created.

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OAS 4.GM.2.1 Worksheets - Determining Angles With Protractors worksheet

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Determining Angles With Protractors

4md6

Student objectives

Choose the correct scale on the protractor (inner or outer) to read the angle correctly.
Read and write the angle measure using the degree symbol (°).

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OAS 4.GM.2.1 Worksheets - Determining Angles With Protractors worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

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Determining Angles With Protractors

4md6

Student objectives

Learn to choose the correct scale on the protractor when the angle does not start at 0.
Measure angles in degrees by reading where the other ray crosses the protractor.
Write the angle measure using the degree symbol (°).

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OAS 4.GM.2.1 Worksheets - Determining Angles in Shapes worksheet

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Determining Angles in Shapes

4g1 4md6

Student objectives

Identify acute, right, obtuse, and reflex angles in a drawing.
Count how many of each type of angle a shape has.
Use angle size clues (smaller than 90°, exactly 90°, between 90° and 180°, greater than 180°) to sort angles correctly.
Pay attention to where the angle is formed at a vertex so you don’t count the wrong corner.

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OAS 4.GM.2.1 Worksheets - Finding Angle (Using Protractor) worksheet

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Finding Angle (Using Protractor)

4md6

Student objectives

Learn how to place a protractor correctly by lining up the center on the vertex and the baseline on one ray.
Practice reading the correct scale on a protractor to measure an angle in degrees.
Write the angle measure using the degree symbol (°).

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