Answer:
3/4 sq. ft.
Step-by-step explanation:
The question is using feet and inches. So, you'd have to convert the 6 inches to feet. How many inches in one foot? 6. So 6=1/2 feet so you do 1 1/2*1/2=3/4
by pythagorean formula, the last side is √(61)
by cos rule
cos A
A = 39.81