Angles of a quadrilateral are in the ratio 1: 2: 3: 4. Find all angles. What special name can you give to this quadrilateral and why?
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So here the angles will be x=36∘, 2x=72∘, 3x=108∘, and 4x=144∘. So the adjacent pair of angles is 180 degrees. So this is a trapezium as the sum of the adjacent angles on the parallel sides is 180 degrees. Note: Trapezium is a kind of quadrilateral.
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