Question 857835
a^2 + b^2 = c^2 in a right triangle
a^2 + 7^2 = 8^2
a^2 + 49 = 64
Subtract 49 from each side
a^2 = 15
Take the square root of each side
a = 3.87 (rounded to nearest tenth)
.
Let's build a fence around the triangle.
You'll need one piece the length of a, on the length of b, and one the length of c.
3.87 + 7 + 9 = 19.87