Find the missing length of the right triangle.
20 ,48
A) 52 B) 54 C) 53 D) 51
Have you heard of Pythagoras Theorem? Here is a good tutorial: Pythagoras Theorem
Basically, in a right angle triangle the formula for the three sides is:
$\displaystyle
a^2=b^2+c^2$
Where $\displaystyle a$ is the hypotenuse.
Does this help you?