Answer:
Each leg is 8 units long
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
Any right triangle must satisfy the Pythagorean Theorem
so
where
c is the hypotenuse (greater side)
a and b are the legs (perpendicular sides)
In this problem we have
substitute
therefore
answer
the number is 12
20 - 7, 40 - 23, and 4 x 4
37
180-(81+62)=37