1. Warm Up’s

4. Area of Trapezoids

5. Trapezoids b1b1 b2b2 h Trapezoids have 2 bases. They are the parallel sides. The height is determined by forming a right angle from base 1 to base 2.

6. Finding the area of trapezoids Area = ½ h (b 1 + b 2 ) 15 cm. 5 cm. b1b1 b2b2 10 cm. h ½ 5 ( 15 + 10) ½ 5 ( 25) 2.5 ( 25) = 62.5 cm 2

7. Ready to try some?

8. Find the area Area = ½ h (b 1 + b 2 ) 16 ft. 4 ft. b1b1 b2b2 11 ft. h ½ 4 ( 16 + 11) ½ 4 ( 27) 2 ( 27) = 54 ft. 2

9. Find the area Area = ½ h (b 1 + b 2 ) 28 ft. 8 ft. 20 ft. ½ 8 ( 28 + 20) ½ 8 ( 48) 4 ( 48) = 192 ft. 2

10. Find the area Area = ½ h (b 1 + b 2 ) 16 m. 5 m. 8m. ½ 16 ( 8 + 5) ½ 16 ( 13) 8 ( 13) = 104 m. 2

11. Find the area Area = ½ h (b 1 + b 2 ) 9 in. 4 in. 6in. ½ 6 ( 9 + 4) ½ 6 ( 13) 3 ( 13) = 39 in. 2

12. Find the area Area = ½ h (b 1 + b 2 ) 31 m. 24 m. 35m. ½ 24 ( 31 + 35) ½ 24 ( 66) 12 ( 66) = 792 m. 2

13. Find the area Area = ½ h (b 1 + b 2 ) 16 cm. 10 cm. 12 cm. ½ 10 ( 16 + 12) ½ 10 (28) 5 ( 28) = 140 cm. 2

14. What is the Area?