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結果 : opposite angles of quadrilateral are equal
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Proof: Opposite angles of parallelogram congruent | Quadrilaterals | Geometry | Khan Academy

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Proof: Opposite sides of parallelogram congruent | Quadrilaterals | Geometry | Khan Academy

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Opposite angles of a quadrilateral ABCD are equal. If AB = 4 cm, determine CD. | 9 | QUADRILATE...

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Quadrilateral having opposite sides equal is a parallelogram

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Opposite angles of a quadrilateral ABCD are equal. If AB = 4 cm, determine CD.

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What are opposite angles in a quadrilateral ?

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Theorem 4: In a Parallelogram, opposite angles are equal | LECTURE 9 | QUADRILATERAL SERIES

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If opposite angles of a quadrilateral are equal, then it is necessarily a ...........

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Quadrilateral with equal opposite angles is a parallelogram 2

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Quadrilateral having opposite angles equal is a parallelogram.

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Classifying Quadrilaterals | MathHelp.com

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6th class#Maths#opposite sides of Quadrilateral#shorts#viral#CognitiveFunLearning

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If each pair of opposite angles of a Quadrilateral are equal then prove that it is a Parallelogram

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If In A Quadrilateral Each Pair Of Opposite Angles Is Equal Then It Is A Parallelogram | Theorem 8.5

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