Question

Can someone check my work for me? Given Triangle ABC, find the length of AB. Which theorem did you use?

Answer 1

i used the Pythagorean theorem and got 12

Answer 2

Do you happen to have a list of available answers?

Answer 3

@JacobChaotic It's not multiple choice, I have to solve it

Answer 4

you use pythagorean theorem

Answer 5

15^2-9^2 is the equation you need to use

Answer 6

then you will need to take the square root of the answer

Answer 7

12 is the correct answer

Answer 8

I thought the Pythagorean theorem was a2+b2=c2 ? I did 9^2+b^2=15^2 and still ended up with 12

Answer 9

Oh man, that's terrible. I sort of have trouble with the Pythagorean Theorem, but I believe the answer would be 12 also. The hypotenuse (15) of the triangle would be C. Then, you could either apply 9 for A or B. For this problem, I'm gonna replace A with 9.

Pythagorean Theorem:
a^2+b^2=c^2
9^2+6^2=15^2
81+36=225
117=225

Then, you would divide 225 by 117 getting you 1.92 which means they're almost half of each other. So, 6 times 1.92 = 11.52, which you could round the answer to 12.

Answer 10

a^2+b^2=c^2 is for working out the hypotenuse. for other sides you use c^2-b^2=a^2

Answer 11

it isn't 6^2. it is 12^2

Answer 12

so i do 15^2-9^2 and then 225-81=144 and take the square root which is 12

Answer 13

you are correct

Answer 14

ok thank you :)