Question

giving medals!!!
A painter is going to paint the trim of a window located 18 feet from the ground. If the base of the ladder is placed 9 feet from the side of the house, how long does the ladder need to be to reach the window?

Answer 1

''Looks like a right triangle and we want to use the pythagorean theorem to solve for the hypotenuse

Answer 2

a2 + b2=c2?

Answer 3

Correct

Answer 4

405??

Answer 5

18*18+9*9=c^2 square root the answer and bam should be right...

Answer 6

Well remember you want the square root of that...

Answer 7

\[\large c = \sqrt{a^2 + b^2}\]

Answer 8

20.12?

Answer 9

There we go!

Answer 10

but whats that in sq root

Answer 11

What do you mean? That would be our result

\[\large 20.12 ft\]

Answer 12

thats not one of my choices though

Answer 13

a.9
b. sq root 9 over 5

Answer 14

c.27

Answer 15

d. 9 sq root 3

Answer 16

None of those are correct

\[\large c = \sqrt{18^2 + 9^2} = \sqrt{324 + 81} = \sqrt{405} = 9\sqrt{5} \]

Answer 17

thank you!

Answer 18

BTW, if you multiply 9 * sqrt(5) you will get your earlier answer of 20.12 in decimal.

Answer 19

thanks @aum