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Recognize angle measure as additive (4.MD.C.7)

Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.


  • Compose and decompose angles

    In this lesson you will learn that angles can be decomposed and recomposed by examining real-world situations.