Answer:
Step-by-step explanation:
The area of a Trapezoid is
Area = (b1 + b2)*h/2
b1 and b2 are the two parallel sides of a trapezoid. In this problem, they are both given.
You are trying to find h (which is x here).
b1 = 13
b2 = 6.4
Area = 78
h = x = ?
78 = (6.4 + 13) * x / 2 Multiply both sides by 2
156 = (6.4 + 13) * x Combine the numbers in the brackets
156 = 19.4 * x Divide by 19.4
156 / 19.4 = x
x = 8.04
