Can sides of a triangle have lengths of 2, 12, and 13 ? Explain why ???

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?