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In a quardilateral ABCD which is …

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In a quardilateral ABCD which is AB II DC and AD II BC prove that angle ADC equal to angle ABC

Posted by Prabhat Kumar 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Ujjwal Dubey 8 years, 7 months ago

Since AB | | DC , angle d + angle a = 180° (consecutive angle same side of the transversal) . Similarly , angle a + angle b = 180° Since both have same R.H.S. Angle a + angle b = angle d + angle a = angle b = angle d. Or Angle ADC = angle ABC

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