Answer:
146.624 square cm
Step-by-step explanation:
Using the area for a trapezoid formula h(a+b)/2 where:
a is the length of the first base: 10.5
b is the length of the second base: 21.1
h is the height of the trapezoid: 9.28
Substitute to find:
9.28(10.5+21.1)/2
9.28(31.6)/2
9.28(15.8)
146.624
