Can 12/52 be made into lowest fraction

Can (2,3 and square root 10) be sides ona right triangle?

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2