Answer: 50°
Explanation:
Hi ! As you can see, the whole angle on which there are the three angles is plane, so it is 180°.
And with this information, you can guess that : C = 180 - ( 65 + 65)
C = 180 - 130
C = 50°
You verify : 65 + 65 + 50 = 180, which means it should be correct, and there you go, hope it helped !