Answer:
90 ft^2
Step-by-step explanation:
The formula for the area of an isoceles triangle is (length 1+ length 2)/2 multiplied by the height.
The first length of the trapezoid is 12 ft. The other is 18 ft. The height is 6 ft.
Plugging these into the formula I get: (12+18)/2 times 6
The answer comes to 90 but don't forget units! The final answer is 90 ft^2
