1. Area of Trapezoids
Tutorial 13c

2. Trapezoids In a trapezoid, the parallel sides are the bases (b1 & b2).
The nonparallel sides are the legs.
The height h is the perpendicular distance between the two parallel bases. b1 b2 h
leg
leg

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

4. Example
Find the area of the following trapezoid:
21 cm
16 cm
38 cm

5. Trapezoids Example #2 2.
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to check your answers

6. Trapezoids Example #2 A = ½•6(6 + 10) A = ½•3(3.2 + 4.4) = ½•6(16)2.
A = ½•6(6 + 10)
A = ½•3( )
= ½•6(16)
= ½•3(7.6)
= 48 cm2
= 11.4 cm2

7. The End
Time to move on
to the assignment or
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