Section 11.2 Notes.

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Presentation transcript:

Section 11.2 Notes

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

Example 1 Find the area of isosceles trapezoid ABCD.

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

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

55º A B D C 8 cm 12 cm 20 cm h

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

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

A B D C E 10 cm 6 cm

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

G H K J D x y 13 in.

Example 5 Find the area of the kite.

13 cm. 5 cm. 10 cm. y x