Question

What is the answer for B and how did you get it ?

Answer 1

The length of side b is 52 because using the Pythagorean theorem we know that a² + b² = c². When we plug in the known values we would get 1521 + b² = 4225, and when we subtract 1521 from both sides we would get b = 52.

Answer 2

So for this we will be using the pythagorean theorem, which is $a^2+b^2=c^2$ . The a and b variable stand for the legs of the triangle and c represents the hypotenuse.

So to start, replace a and c variable with 39 and 65. Your equation should look like this: $39^2+b^2=65^2$ . From here we can solve.

Solve the exponents to get $1521+b^2=4225$

Subtract 1521 on each side to get $b^2=2704$

Square root each side and your answer should be $b=52$km