NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area

Fill in the Blanks

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

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

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

In Fig. 9.25, area of parallelogram BCEF is ________ cm² where ACDF is a rectangle.

To find area, any side of a parallelogram can be chosen as ________ of the parallelogram.

Perpendicular dropped on the base of a parallelogram from the opposite vertex is known as the corresponding ________ of the base.

The distance around a circle is its ________.

Ratio of the circumference of a circle to its diameter is denoted by symbol ________.

If area of a triangular piece of cardboard is 90 cm², then the length of altitude corresponding to 20 cm long base is ________ cm.

Value of π is ________ approximately.

Circumference ‘C’ of a circle can be found by multiplying diameter ‘d’ with ________.

Circumference ‘C’ of a circle is equal to 2π × ________.

1 m² = ________ cm².

1 cm² = ________ mm².

1 hectare = ________ m².

Area of a triangle = ½ base × ________.

1 km² = ________ m².

Area of a square of side 6 m is equal to the area of ________ squares of each side 1 cm.

10 cm² = ________ m².