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M Mensuration 11 - NCERT

172 MATHEMATICS DO THIS TRY THESE Area of ∆ ECD = 1 2 h × c = 1 12 10 2 × × = 60 m 2. Area of rectangle ABCE = h × a = 12 × 20 = 240 m 2. Area of trapezium ABDE = area of ∆ ECD + Area of rectangle ABCE = 60 + 240 = 300 m 2. We can write the area by combining the two areas and write the area of trapezium as

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