Mathematics, 06.11.2019 06:31 hunterallan569

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.

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if m∠abc = 70°, what is m∠abd? justify your reasoning.

using the addition property of e...