1. Section 11.2 Notes

2. Area of a Trapezoid
The area of a trapezoid is half the product of the height and the sum of the bases. b2 h b1

3. Example 1
Find the area of isosceles trapezoid ABCD.

4. 40 26 20 A B D C 10 20 10 24 h

5. Example 2
Find the area of trap. ABCD to the nearest square centimeter.

6. 55º A B D C
8 cm
12 cm
20 cm h

7. Area of a Rhombus and a Kite
The area of a rhombus and kite is one-half the product of its diagonals.

8. Example 3 Find the area of rhombus ABCD. A = 96 cm2 D C 6 cm 10 cm E A

9. A B D C E
10 cm
6 cm

10. Example 4
Find the area of rhombus GHJK with HG = 13 in and mHGK = 70° to the nearest tenth.

11. G H K J D x y
13 in.

12. Example 5
Find the area of the kite.

13. 13 cm.
5 cm.
10 cm. y x