Write a two-column proof. Given: <2 is congruent to <5; Segment AB is congruent to Segment DE
Prove: Segment BC is congruent to Segment EC

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.

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

Find the measure of the angle indicated in bold