Question

medal and fan to who ever helps me
a = ?, b = 13, c = 21

A.
15.83

B.
15.87

C.
16.19

D.
16.49

Answer 1

Is this a right triangle?

Answer 2

there isnt a triangle

Answer 3

Pythagorean Theorem.

\(\sf a^2 + b^2 = c^2\)

Plug in what we know:

\(\sf a^2 + 13^2 = 21^2\)

Solve for 'a'