I don’t understand. Need help:/ What is the area of triangle ABC?

O 10.39
O 31.18
O 124.71
O 62.35

62.35

Step-by-step explanation:

Triangle ABC is an isosceles triangle. That means Side CA equals Side CB.

Drawing an altitude line from point A, it divides Side CB into halves. 1/2 of 12 = 6. (Let's call that point M)

Side AM^2 = AC^2 - CM^2

---------------------> 12^2 - 6^2 = 144 -36 = 108

AM = = 6

To find the area: CB * AM * 1/2

---------------------> 12 *  6 * 1/2 = 36

36 as a decimal is approximately 62.35

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.