A container for posters is shaped like a cylinder. Its dimensions are shown in the diagram. Which measurement is closest to the total surface area of the container in square inches?
A. 494.80 in?
B. 228.16 in?
C. 182.80 in?
D. 66.50 in

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.