Answer:
63.72 ft^2
128 cm^2
Step-by-step explanation:
5. The area of a triangle is
A = 1/2 bh where b is the base and h is the height
A = 1/2(21.6) * (5.9)
= 63.72 ft^2
6. The scale factor is 20/15 = 4/3
When we find area is the scale factor is squares
(4/3) ^2 = 16/9
Taking the ratio of the areas
A big trap
------------------- = scale factor squared
A little trap
A big trap 16
-------------- = ------
72 9
Using cross products
9A = 16*72
9A = 1152
Divide each side by 9
A = 1152/9
A =128
The area of the large trapezoid is 128 cm^2
