What is the surface are of i need to know now

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

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.