This document provides formulas for calculating the areas of parallelograms, triangles, and trapezoids. It gives the formulas as A = bh for parallelograms, A = 1/2bh for triangles, and A = 1/2h(b1 + b2) for trapezoids. It then lists example problems for finding the area of each shape using the given measurements. The document concludes by directing the reader to homework problems 3 through 28 on page 523 to practice applying the area formulas.

1. Basic Geometry Unit 10.5 – AREA Parallelograms, Triangles, & Trapezoids

2. Area of a Parallelogram A = bh b h

3. Find the area of each parallelogram. 3 m 3 m 4.3 in . 6.2 in.

4. Area of a Triangle A = 1/2 bh b h

5. Find the area of each triangle. 3 m 4 m 3.9 ft 6.4 ft

6. Area of a Trapezoid A = 1/2 h (b1 + b2) b 2 b 1 h

7. Find the area of each trapezoid. 5.25 m 6 m 7.5 m 10 ft 19 ft 7 ft 7.5 ft 8 ft