4.GR.A.4: Relate the area of a triangle to the area of a rectangle using decomposition and visual models. Derive and apply the formula to solve problems in contexts involving triangles positioned within or formed from the decomposition of rectangles

Relate the area of a triangle to the area of a rectangle using decomposition and visual models. Derive and apply the formula to solve problems in contexts involving triangles positioned within or formed from the decomposition of rectangles

Example Problems

A triangular poster of a Minecraft build is a right triangle. Its two perpendicular sides (the legs) measure

17 \text{ feet}

and

24 \text{ feet}

. What is the area of the poster?

A triangular corner flag for the soccer team is a right triangle. Its two perpendicular sides (the legs) measure

6\text{ inches}

and

10\text{ inches}

. What is the area of the flag?

A triangular pennant for the volleyball team is a right triangle. Its two perpendicular sides (the legs) measure

4 \text{ feet}

and

9 \text{ feet}

. What is the area of the pennant?

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