Area of sector = 1/2 * r^2 * x where r = radius and x = angle in radians
86 = 1/2 * r^2 * pi/4
r^2 = 2 * 86 * 4 / pi = 219
r = sqrt 219
= 14.80
You need to keep letters on one side and numbers on the other side. And when you move 5 over you have to change the sign.
9t = 103 + 5
9t = 108
t = 108 ÷ 9
t = 12
Answer:2
Step-by-step explanation:
To know the answer in the problem above, we will use the formula for getting the surface area of a square pyramid where one side of the base is 7 inches and the surface area is 189 sq inches and x is the height of the square pyramid. In equation, A= a^2 + 2a√a^2 / 4 + h^2 . The height would be, 9.39 inches.
