Which sequence of transformations performed on shape I confirms the congruence of shape II and shape I? A.
a reflection across the y-axis and then a translation down 16 units
B.
a 90° counterclockwise rotation about the origin and then a translation down 8 units
C.
a 90° clockwise rotation about the origin and then a translation left 16 units
D.
a 180° rotation about the origin and then a translation left 8 units

Which of the following is the result of expanding the series

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.

Is a square always, sometimes, or never a parallelogram