Question

Refer to diagram...

Answer 1

If two sides of a triangle and the included angle are known, you can use the law of cosines to find the length of the third side.

Answer 2

Law of Cosines: c^2 = a^2 + b^2 - 2abcos(C)

Here it is: AB^2 = OA^2 + OB^2 - 2(OA)(OB)cos(AOB) = ?

Answer 3

What is AOB supposed to be? I'm confused.

Answer 4

AOB is the angle. 45 degrees.

Answer 5

Is 9 the answer?

Answer 6

I am getting 9.18 that can be rounded up to 9.2 or down to 9 depending on how many decimal places they want.

Answer 7

Thank you!

Answer 8

You are welcome.