Radius of a Circle
Radius of a Circle: Overview
This Topic covers sub-topics such as Compass Tool, Measuring Radius of a Circle, Comparing Radius of Round Objects, Measuring Radius using a Ruler, Relating Size and Radius and, Comparing Radius of Circles
Important Questions on Radius of a Circle
Are all wheels of a tractor or road roller of the same radius?

Are all the wheels of a bicycle or a bullock cart of the same radius?

Lali and Kali are tied to a pole with ropes. Kali has a longer rope, when compare to Lali, Kali can look for more grass.

Lali and Kali are tied to a pole with ropes. Kali has a longer rope. Who can look for more grass to eat?

Draw the radius of the following circles. Guess which circle has the longer radius.

Draw the radius of this bangle using a ruler. Measure the length of the radius.

Lali and Kali are tied to a pole with ropes. Kali has a longer rope. Who can look for more grass to eat?

Have you seen a tractor or a road roller? Which is the biggest wheel you have ever seen?
Are all wheels of a tractor or road roller of the same radius?

Are all the wheels of a bicycle or a bullock cart of the same radius?


Compass tool is a _____ instrument.

Write down the definition of compass tool.

A child is carrying a ball of radius and a balloon of radius . The ball is smaller than the balloon.

Find the bigger circle based on the bigger radius.

How the radius is related to circle?

Circle is having only one radius.


Size of the circle depends on the _____.

Name the objects which can be used to measure the radii.

The length of the radius of the circle is equal to _____ of the rope used.
