Grade 4 · Measurement and Data

CCSS.MATH.CONTENT.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.

Read this standard on the official Common Core site

Lessons that teach this standard

• Angles: Naming, Measuring and Adding

  What an angle is, why a degree is a fraction of a full turn, how to name angles as acute, right or obtuse, and why angle measures add when angles sit side by side.