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**Standard(s): **
[MA2015] (4) 25 :

25 ) Recognize angle measure as additive. When an angle is decomposed into nonoverlapping 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 or mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure. [4-MD7]

This learning activity should be used at the end of a lesson on recognizing angle measure as additive. The students will find missing angle measurements using a real-world problem. This learning activity can be used as an assessment.

*This activity results from the ALEX Resource Gap Project.*