What is the correct answer​

We can solve this with the Pythagorean Theorem.

The Pythagorean theorem states that a2 + b2 = c2 in a right triangle where c is the longest side. You can use this equation to figure out the length of one side if you have the lengths of the other two.

Just square the sides, add them, and then take the square root. Here's an example:

We can solve it like this ~

= 2,500

y =

= 50

Therefore, the correct answer is 50.

i used to know how to do this in 7th but i forget easily

step-by-step explanation: