Question

Find the length of the third side

Answer 1

15

Explanation:

Hello There!

We can find the missing side length using the Pythagorean theorem

The Pythagorean theorem states that the sum of the two legs squared equal the hypotenuse squared

so now we want to make an equation using the Pythagorean theorem

let c^2 be missing side length

`12^2+9^2=c^2`

now we can solve

`12^2=144\\9^2=81\\81+144=225\\225=c^2\\√(225) =15\\√(c^2) =c\\c=15`

So we can conclude that the length of the missing side is 15

Answer 2

by using Pythagoras law

third side is hypotenuse

=√(12²+9²)=15