Question

The area of a trapezoid is found using the formula A=1/2h (b1+b2) , where b1 and b2 are the parallel sides of the trapezoid and h is the height of the trapezoid. What is the area, in square kilometers, of a trapezoid with bases 5 km and 7 km and height 3 km?

A.14.5

B.18

C.36

D.52.5

Answer 1

@bibby

Answer 2

ok lets do this step by step

Answer 3

first set up your equation

Answer 4

I set up this problem (H(b1+b2) )/2

Answer 5

so step one 3(5+7)

Answer 6

which equals 36

Answer 7

and divided by 2 equals 18

Answer 8

18 is your answer

Answer 9

You will add 5+7 because those are the bases. You should get 12. Now take the height which is 3 and divide by 2. you should get 1.5. Now multiply that by 12. You should then get the answer of 18