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Question

**Dear Teachers, please help to solve… thanks in advance.

Answer

Area of triangle ABC = 0.5 x 20cm x 28cm = 280 cm2

Area of triangle ADE = 0.5 x 16cm x 14cm = 112 cm2

Area of triangle AFG = 0.5 x 10cm x 8cm = 40cm2

Area of DEGF = Area of triangle ADE – Area of triangle AFG = (112-40) cm2 = 72 cm2

Area of shaded areas = Area of triangle ABC – Area of DEGF  = (280 – 72) cm2 = 208 cm2

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