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Question

Construct a quadrilateral ABCD, where ∠A = 65°, ∠B = 105°, ∠C = 75° BC = 5.7 cm and CD = 6.8 cm.

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Solution

We know that the sum of all the angles in a quadrilateral is 360.i.e., A+B+C+D=360°D=115°Steps of Construction:Step I: Draw BC=5.7 cm.Step II: Construct XBC=105° at B and BCY=105° at C.Step III : With C as the centre and radius 6.8 cm, cut off CD=6.8 cm.Step IV: At D, draw CDZ=115° such that it meets BY at A. The quadrilateral so obtained is the required quadrilateral.



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