Determine the missing length. Show your work!

15

Step-by-step explanation:

Pythagorean theorem: the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse.

C = the square root of A squared + B squared.

plug in the numbers

C = the square root of 9 squared + 12 squared = 15

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's