Answer :

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° and BCY = 75.

Step III: With C as the center 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.

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