What is the missing side length of this right triangle?

The missing side is 12

Step-by-step explanation:

5^2 + 12^2 = 13^2 by the pythaogerean thereom.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.