Find the area of the triangle
base = 15 ft.
sin 48º = height/11.5 → height = 11.5sin48º ft.
area = (1/2)(base)(height)
area = (1/2)(15)(11.5sin48º) sq. ft.
area = 86.25sin48º sq. ft.
area ≈ 64.096 sq. ft.