Question

I need help with khan academy home work

Answer 1

`x=12`

Explanation:

We can split the triangle in half and use the pythagorean theorem to find half of x

`3^2+b^2=√(45) ^2\\9+b^2=45`

Subtract 9 from both sides

`b^2=36`

Square root both sides

`b=6`

This is half of x so to find the full thing we just multiply by 2

`6*2=12`

`x=12`

Hope this helps let me know if you have any questions