Answer:
12ft²
Explanation:
Christi is making a large poster in the shape of a trapezoid for an art project. The shorter base is 5 ft, the longer base is 7 ft, and the height is 2 ft. What is the area of the poster?
The area of a trapezoid is calculated as:
1/2 ( a + b) h
Where
a = Shorter base = 5ft
b = Taller base = 7ft
h = Height = 2 ft
Hence,
Area of Trapezoid =
1/2(5 + 7)2
= 1/2 × 12 × 2
= 12 ft²
Therefore, the area of the poster(Trapezoid) = 12 ft²