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Turn your fourth grader into a geometry detective! How many degrees is each missing angle in these quadrilaterals?

The Missing Angle: Quadrilaterals

Help students learn how to use a protractor.

Protractor Practice

How well do you know your angles? Let's find out! Use this geometry resource to help your students identify and differentiate between important angles such as acute, obtuse, straight, and right angles.

Know Your Angles

Let your fourth grader play triangle detective: can she spot the acute triangles on this worksheet?

Identifying Triangles: Acute Triangles

Supplementary, Complementary, Vertical, and Adjacent Angles

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