Ineed with these any one know how to do proofs?

Problem 1

Work Shown:

For any convex polygon, the sum of the exterior angles is always 360 degrees

Add up all the angles shown, set the sum equal to 360, then solve for v.

9v+(19v-21)+45+(v+48)+7v = 360

36v+72 = 360

36v+72-72 = 360-72

36v = 288

36v/36 = 288/36

v = 8

Problem 2

Explanation:

Segment WU is not an altitude because we have no angle markers to show if WU is perpendicular to VT.

Segment WU is not a median since we dont know if TU = UV or not.

Segment WU is not an angle bisector. If it were an angle bisector, then the two angles marked (33 and 40) should be equal angles. In other words, an angle bisector cuts an angle into two equal halves.