in a quadrilateral ABCD ,∆A+∆B=180°. Does this mean A parallel to DC WHY ?what special name does this quadrilateral have
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Step-by-step explanation:
Since, ABCD is a quadrilateral and ∠A+∠D= 180°. ... If the two lines are parallel and also, the angle sum of two adjacent angles equal to 180°, then this type of quadrilateral is known as "Trapezium"
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Answer:
trapezium
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