Answer:
c. 12
Step-by-step explanation:
Deduct 11 from 21 to get 10, then split it in half, to get 5 as your two bases for the right triangles. Now, according to the Pythagorean Theorem, a² + b² = c², in this case, since the hypotenuse, c, is already defined, use Subtraction to find the other leg:
[tex]25 = 5^2 \\ 169 = {13}^{2} [/tex]
25 + b² = 169
-25 - 25
______________
√b² = √144
b = 12
When we are talking about lengths, we want the NON-NEGATIVE root.
I am joyous to assist you anytime.
