Question

5. In the adjacent diagram, CD = 4 cm.
Find length of AB and BC.

Answer 1

Draw perpendicular (normals) to the sides at the points where the inscribed circle touches the quadrilateral.

Let GC = x cm.  So  DG = 4 -x = DH = 4-x  cm

As CF = x cm, FB = 7-x  so BE = 7 - x  cm

So AE = 6 - (7-x) = x-1  cm

So AH = x-1 and  AD = x-1+4-x = 3 cm

seethe pic that i have attached

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Answer 2

Answer:

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