Can someone please help me on this geometry test, serious inquiries only, be a real one

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.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Which statements are true about additional information for proving that the triangles are congruent check all that apply