<em>The quadrilaterals which cannot have two consecutive angles of 90 degrees each are the</em><u><em> </em></u><u><em>KITE</em></u><u><em> </em></u><em>and the </em><u><em>TRAPEZOID</em></u><u><em>.</em></u>
<u><em>thanx</em></u>
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