Q11 of 30 Page 219

Split the following shapes into rectangles and find their areas. (The measures are given in centimetres).

The area of the above given figure can be calculated as:

(a) We know that,


Area of rectangle = Length × Breadth


Therefore,


Atrea of 1st rectangle = 12 × 2 = 24 cm2


Also,


Area of 2nd rectangle = 8 × 2 = 16 cm2


Thereore,


Total area= 24 + 16 cm2


= 40 cm2


(b) The area of the above given figure can be calculated as:


We know that,


Area of rectangle = Length × Breadth


Also,


Area of square = (Side)2


Therefore,


Area of 1st rectangle = 21 × 7


= 147 cm2


Area of 2nd square = 7 × 7


= 49 cm2


Also,


Area of 3rd square = 7 × 7


= 49 cm2


Therefore,


Total Area = 147 + 49 + 49


= 245 cm2


(d) The area of the above given figure can be calculated as:


We know that,


Area of rectangle = Length × Breadth


Therefore,


Area of 1st recatngle = 5 × 1 = 5 cm2


Also,


Area of 2nd rectangle = 4 × 1 = 4 cm2


Therefore,


Total area = 5 + 4 = 9 cm2


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