What is the measure of angle y in this figure? enter your answer in the box. y = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 163 degrees, z degrees, y degrees, and x degrees.

Answer question above and explain each step : )

Which of the following is not a subset of {1,2,3}?

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.