Fill in the blanks.

Question 11 Mark

If the area of a triangular piece of cardboard is $90 \ cm^2,$ then the length of the altitude corresponding to $20 \ cm$ long base is ………. $cm$.

Answer

If the area of a triangular piece of cardboard is $90 \ cm^2,$ then the length of the altitude corresponding to $20 \ cm$ long base is $9 \ cm$.

Question 21 Mark

The ratio of circumference to the diameter of a circle is ………..

Answer

The ratio of circumference to the diameter of a circle is π.

Question 31 Mark

To find the cost of polishing a table-top, we need to find the ………. of the table-top.

Answer

To find the cost of polishing a table-top, we need to find the area of the table-top.

Question 41 Mark

If the perimeter of a parallelogram is 40 cm and the length of one side is 12 cm, then the length of the adjacent side is ……

Answer

If the perimeter of a parallelogram is 40 cm and the length of one side is 12 cm, then the length of the adjacent side is 8 cm.

Question 51 Mark

An area of $1 \ km^2 =$ ……… hectare

Answer

An area of $1 \ km^2 = 1000$ hectare

Question 61 Mark

The perimeter of a rhombus is = 4 × ………

Answer

he perimeter of a rhombus is = 4 × length of side.

Question 71 Mark

The unit of measurement of the area is ……….

Answer

The unit of measurement of the area is a square unit.

Question 81 Mark

The perimeter of a regular polygon = ……….. × length of a side.

Answer

The perimeter of a regular polygon = Number of sides × length of a side.

MATHS Fill in the blanks.