I am just starting to learn how to use the pythagorean theorem. I have encountered a problem that asks me to apply it to an isosceles triangle. I can see that each side forms a right triangle and both legs are equal. The problem: An isosceles triangle has a height of 12in and two sides of 18in. How long is the base?Iam not sure how to begin. I do know that I should double the answer for the measurement of the entire length. Please help me. Thanks in advance.