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18. Area of a Trapezium and a Polygon
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Q7 of 39 Page 212

The base of a triangle is 14 cm and its height is 8 cm. The area of the triangle is

Given


Length of the base of the triangle = 14 cm


Length of the heigth of the triangle = 8 cm


Area of the triangle = × base × height


Therefore area = × base × height


= × 14 × 8 = 7 × 8 = 56 cm

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5

Find the area of a quadrilateral one of whose diagonals is 40 cm and the lengths of the perpendiculars drawn from the opposite vertices on the diagonal are 16 cm and 12 cm.

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The base of a triangle is four times its height and its area is 50 m2. The length of its base is

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Questions · 39
18. Area of a Trapezium and a Polygon
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