Question

@phi
Could you help me with this problem?

Answer 1

I think it could be C. , but I'm not sure.
XOA = 23 , not 90 or 44, thus I think it's C.

Answer 2

you read angles by starting at the first point, moving along the line to the (center) point, then out along a new line to the last point.
XOA starts at X, goes to the center O, and then to A. This angle is not 23

Answer 3

However, XOA plus the 2 "base" angles add up to 180
XOA + 2*23 = 180
or
XOA= 180 - 2*23

Answer 4

so choice C is the correct answer.

Answer 5

@amistre64 and @phi you are lifesavers! :D

Answer 6

Thank you!

Answer 7

yes, but if you work hard, you can become your own life saver.

Answer 8

Ah, how inspirational :)