Answer:
307ft^2
Explanation:
To explain this, you are looking for the area of half a circle + the area of a triangle.
To first find the area of half a circle, we need the equation Area = pir^2/2
Plug-in radius, which is 10ft
pi(10)^2/2
= 157ft^2
Next, we find the area of the triangle. The equation to find the area of a triangle is A=1/2(b)(h)
B=base
h=height
To find the base, we simple make the base equal to the diameter of the circle, which is the radius multiplied by 2
So base = 10*2 = 20
The height is given so
height=15
Plug in base and height = 20*15/2
= 150ft^2
Then you want to add both areas found together
157ft^2+150ft^2
= 307ft^2