Question

What is the value of $x$ using Pythagoras theorem?

• A. 10
• B. 12
• C. 5
• D. 4

Answer 1

The correct option is B 12

In a right triangle, $a^2+b^2=h^2$, where $a$ and $b$ are the lengths of the legs and $c$ is the length of the hypotenuse. This is called Pythagoras Theorem.
$a=5,b=x,c=$ hypotenuse side $=13$
$5^2+x^2={13}^2$
$169-25=$ $x^2$
$x^2$ $=144$
Taking root on both the sides, we get
$x=12$