Radius of a Circle

IMPORTANT

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

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Are all wheels of a tractor or road roller of the same radius?

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

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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.

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

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

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

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

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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?

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

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Is a compass tool is

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Compass tool is a _____ instrument.

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Write down the definition of compass tool.

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A child is carrying a ball of radius 24 cm and a balloon of radius 20 cm. The ball is smaller than the balloon.

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Find the bigger circle based on the bigger radius.

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How the radius is related to circle?

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Circle is having only one radius. 

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What is radius?

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Size of the circle depends on the _____.

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

 

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