Question

Find the missing length. Round to the nearest tenth if necessary. side=8 and 21

A. 441

B. 22.5

C. 64

D. 19.4
hi
PLZ help me i have no idea how to do this
Ms. Sue
Apparently you have a right triangle. Use the Pythagorean Theorem:
a ^2 + b^2 = c^2

hi
the problem is i'm trying to find the length for B i have a and c already
Ms. Sue
Just plug the numbers in to the formula.