Extra credit! 20
db is a diagonal of parallelogram abcd .
what is the measure of ∠ad...
Mathematics, 30.07.2019 00:20 Ruijinzhang3142
Extra credit! 20
db is a diagonal of parallelogram abcd .
what is the measure of ∠adb?
enter your answer in the box.
°
image shows a quadrilateral a b c d with diagonal d b. angle a is 115 degrees. angle b d c is 29 degrees.
Answers: 1
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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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