Question

The hypotenuse of a right triangle is 37 mm. One leg of the right triangle is 12 mm. What is the length of the other leg?

Answer 1

Use the pythagorean theorem:
$a^2+b^2=c^2$
$12^2+b^2=37^2$
$144+b^2=1369$
$b^2=1225$
$\sqrt{b^2} = \sqrt{1225}$
$b=35$
Your answer is 35mm.