Q3 of 99 Page 248

Let us see the card below, find perimeter and let us write by calculating what will be the length of one side of equilateral triangle with same perimeter.

Note: Perimeter of equilateral triangle with side ‘a’ is


(i)Perimeter of rectangle


Where a = length and b = breadth of rectangle respectively


cm


cm


Now, the perimeter of Equilateral triangle cm


cm


cm


(ii)Perimeter of square



Where a = side of square


cm


cm


Now, the perimeter of equilateral triangle = 36 cm


cm


cm


(iii)Perimeter of quadrilateral = The distance covered to go one round along perimeter



cm


cm


Now, the perimeter of equilateral triangle = 39 cm


cm


cm


(iv)Perimeter of parallelogram = 2 (a + b)


Where a = length and b = breadth


cm


cm


Now, the perimeter of equilateral triangle = 66 cm


cm


cm


(v)Perimeter of triangle = (a + b + c)


Where a, b and c are sides of triangle respectively


cm


cm


Now, the perimeter of equilateral triangle = 30 cm


cm


cm


(vi)Perimeter of triangle = (2a + b)


Where a and b are sides of isosceles triangle


cm


cm


cm


Now, the perimeter of equilateral triangle = 45 cm


cm


cm


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 2

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 1

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