Can someone check my work for me? Given Triangle ABC, find the length of AB. Which theorem did you use?
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i used the Pythagorean theorem and got 12
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@JacobChaotic It's not multiple choice, I have to solve it
you use pythagorean theorem
15^2-9^2 is the equation you need to use
then you will need to take the square root of the answer
12 is the correct answer
I thought the Pythagorean theorem was a2+b2=c2 ? I did 9^2+b^2=15^2 and still ended up with 12
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.
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.
a^2+b^2=c^2 is for working out the hypotenuse. for other sides you use c^2-b^2=a^2
it isn't 6^2. it is 12^2
so i do 15^2-9^2 and then 225-81=144 and take the square root which is 12