Question

What is the length of side x? If necessary, round your answer to two decimal places.
( Picture attached below )

Answer 1

@hartnn I know the setup is a^+b^2=c^2 but how do I know to set the numbers up in the right spot?

Answer 2

@agent0smith Can you help me set this up?

Answer 3

c^2 is always the hypotenuse (longest side)

Answer 4

So is the setup a^2+7^2=21^2?

Answer 5

Yes, but the image uses x^2 not a^2, but it doesn't really matter which you choose.

Answer 6

Give me a min to work it out then can you check it for me?

Answer 7

k

Answer 8

okay i got square root 19.79 but says if necessary round your answer to two decimal places which mean that would be 19.80 correct? which is right?

Answer 9

Yeah, round to 19.8

Answer 10

okay thanks! Really appreciated it!