Warm Up’s

Warm Up’s

Warm Up’s

Area of Trapezoids

Trapezoids

b1

b2

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.

Finding the area of trapezoids

Area = ½ h (b1 + b2)

15 cm.

5 cm.

b1

b2

10 cm.

h

½ 5 ( 15 + 10)

½ 5 ( 25)

2.5 ( 25) = 62.5 cm2

Ready to try some?

Find the area

Area = ½ h (b1 + b2)

16 ft.

4 ft.

b1

b2

11 ft.

h

½ 4 ( 16 + 11)

½ 4 ( 27)

2 ( 27) = 54 ft.2

Find the area

Area = ½ h (b1 + b2)

28 ft.

8 ft.

20 ft.

½ 8 ( 28 + 20)

½ 8 ( 48)

4 ( 48) = 192 ft.2

Find the area

Area = ½ h (b1 + b2)

16 m.

5 m. 8m.

½ 16 ( 8 + 5)

½ 16 ( 13)

8 ( 13) = 104 m.2

Find the area

Area = ½ h (b1 + b2)

9 in.

4 in.

6in.

½ 6 ( 9 + 4)

½ 6 ( 13)

3 ( 13) = 39 in.2

Find the area

Area = ½ h (b1 + b2)

31 m.

24 m.

35m.

½ 24 ( 31 + 35)

½ 24 ( 66)

12 ( 66) = 792 m.2

Find the area

Area = ½ h (b1 + b2)

16 cm.

10 cm.

12 cm.

½ 10 ( 16 + 12)

½ 10 (28)

5 ( 28) = 140 cm.2

What is the Area?