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9. Perimeter and Area
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Q38 of 131 Page 226

Fill in the blanks to make the statements true.

Perimeter of a regular polygon = length of one side × ___________.

Perimeter of regular polygon = Length of one side × Number of sides


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36

If the radius of a circle is tripled, the area becomes

37

The area of a semicircle of radius 4r is

39

Fill in the blanks to make the statements true.

If a wire in the shape of a square is rebent into a rectangle, then the________ of both shapes remain same, but _______ may vary.

40

Fill in the blanks to make the statements true.

Area of the square MNOP of Fig. 9.24is 144 cm2. Area of each triangle is_______.


Questions · 131
9. Perimeter and Area
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