At least 40.There is two sides.Heads and tails.Divide that by two.80/2=40.
Angle V is 40. Angle V and Y are congruent. The angles of a triangle are a sum of 180. Angle V and Angle Y add up to 80. Therefore angle VWZ is 100
75m + 800 = 95m + 500
Solve that equation
Which should get you m=15
15 is your answer