Q.1.
What is the area of a circle with a radius of 7 cm (to one decimal place)?
Q.2.
A circular lawn has a 20 m radius. What is the approximate circumference of the lawn?
Q.3.
A line which passes through the center of a circle and joins two points on its circumference is called a .......
Q.4.
The distance measured around a circle is called the .......
Q.5.
What can be calculated using π r ?
Q.6.
What is the correct formula for the circumference of a circle?
Q.7.
The area of a circular lawn is 628 m . How far is it across to the nearest meter?
Q.8.
To the nearest square meter, what is the area of a circular pool with a radius of 10 m?
Q.9.
A line which joins the center of a circle to a point on the circumference is called a .......
Q.10.
A round table has a diameter of 200 cm. What is the approximate circumference of the table?