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Calculate the area of the figure given below: which is not drawn scale. - Mathematics

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Question

Calculate the area of the figure given below: which is not drawn scale.

Sum

Solution

Here we found two geometrical figures, one is a triangle and the other is the trapezium.
Now,
Area of the Triangle = `1/2` x 12 x 25
                                = 150 sq.cm

Area of Trapezium = `1/2 xx ( 25 + 15 ) xx ( sqrt(26^2 - ( 25 - 15 )^2))`
= 20 x 24
= 480 sq.cm
hence area of the whole figure = 150 + 480 = 630 sq.cm

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Chapter 20: Area and Perimeter of Plane Figures - Exercise 20 (B) [Page 256]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 20 Area and Perimeter of Plane Figures
Exercise 20 (B) | Q 23 | Page 256
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