Answer:
313.5 sqft
Step-by-step explanation:
So you have an regular octagon.
There are 8 congruent triangles. We can divide every one of those triangles into two right triangle. It makes total of 16 right triangles.
They are giving us the measurements here. The hypotenuse is 10 ft and the height is 9.2 ft. We need to calculate the size of the last side. We do it by using pythagoream theorem.
10 squared = 9.2 squared + x squared
100 = 84.64 + x squared
x squared = 15.36
x= square root of 15.36
x= 3.91918 ft
You calculate (10*3.91918)/2 to get area of the one triangle.
That is 19.5959 sqft
We have 16 triangles so you multiply that by 16.
19.5959*16= 313.5 sqft
I hope I helped you and I will be happy If you mark my answer as brainliest.
