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area of ABCD with integer sidelengths wanted 2018 Malaysia OMK Juniors A1

Source:

September 19, 2021
geometryarea

Problem Statement

Quadrilateral ABCDABCD is neither a kite nor a rectangle. It is known that its sidelengths are integers, AB=6AB = 6, BC=7BC = 7, and ∠B=∠D=90o\angle B = \angle D = 90^o. Find the area ofABCD ABCD.
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