## anonymous one year ago A carpenter is framing a wall that is 8 feet high and 15 feet long. If the carpenter wants to be sure that the sides of the wall meet at right angles, then what should the diagonal measurement of the wall be? A.) 13 feet B.) 17 feet C.) 19 feet

1. AbdullahM

Hi

2. AbdullahM

What is the Pythagorean theorem?

3. anonymous

a(squared+b(squared)= c(squared)

4. AbdullahM

|dw:1435340051091:dw| Use it to solve for x

5. anonymous

i got 161

6. AbdullahM

how?

7. anonymous

i did |dw:1435340363208:dw|

8. phi

don't subtract 64 just add the two numbers

9. phi

10. anonymous

when i added 64+225 i got 289

11. phi

yes, that means c^2 = 289 people "get rid of the square" by "taking the square root" of both sides

12. anonymous

i got 17

13. AbdullahM

14. phi

in other words, we do $\sqrt{c^2} = \sqrt{289}$ on the left, you get c on the right you get 17 c= 17

15. phi

btw, when you did -64 , you have to do that to *both sides*, like this 64 + 225 - 64 = c^2 - 64 but that is "legal" but not useful. as you see, adding 64+225 to get one number is the way to solve the problem