Construct a quadrilateral ABCD with AB = 2.5 cm, BC = 3.5 cm, AD = 4.5 cm, angleA = 90° and
angleB = 120°.
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Find the area of a quadrilateral ABCD in which AB = 3 cm, BC = 4 cm, CD = 4 cm, DA = 5 cm and AC = 5 cm. ∴ ΔABC is right angled with ∠B = 90°. = 2 x 4.6 cm2 (approx.) = 9.2 cm2 (approx.)
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