Answer:
13.
Explanation:
This triangle applies a theorem for only right triangles.
It is called the Pythagorean Theorem
It is a squared plus b squared = c squared.
C is your hypotenuse
A is one of the legs of the triangle
B is the other leg.
Plug 5 and 12 to the theorem. They are your legs, so 5 squared plus 12 squared= c squared.
5 squared is 25 and 12 squared is 144.
Add 144 plus 25 equals 169.
Don't get fooled with 169 because that is c squared= 169. You can still simplify c. Do the square root of both sides. the squared root of c squared is c because square roots and exponents are inverse operations. The square root of 169 is 13. Therefore, c=13.
Hope this helps!