Answer:
The answer is 89
Explanation:
Pythagorean theorem is a²+b²=c²
5 is variable a. We square it, 5² = 5×5 which equals 25.
8 is variable b. We square it, 8² = 8×8 which equals 64.
Add 64 and 25, because in a²+b²=c² we have to add a² and b² together.
The result is c², which is also called the hypotenuse. c² equals 89.
So, why is it the square root of 89? Well, we squared the other numbers, 5 and 8. A square root reverses an exponent to the second power (square).
The Pythagorean theorem is actually really fun and easy once you get it. You'll learn that geometry when it's just simple formulas, all you have to do is add in the numbers. The quiz didn't ask you what the square root of 89 is, and generally you wont need to know.
Thanks!
-throckmorton