Relation between Diameter Radius and Circumference



Relation between diameter radius and circumference are discussed here.



Relation between Diameter and Radius:

What is the relation between diameter and radius?

Solution:

Diameter of a circle is twice of its radius.

Formula:

Diameter = 2 radius

Radius = Diameter/2

For Example:

1. Find the diameter of a circle whose radius is 4.5 cm.

Solution:

We know, Diameter = 2 radius.

Radius = 4.5 cm.

= 2 x 4.5 cm.

= 9 cm.

Therefore, diameter = 9 cm.



2. Find the radius of a circle whose diameter is 7 cm.

Solution:

We know, Radius = Diameter/2

Diameter = 7 cm.

= 7/2 cm.

= 3.5 cm.

Therefore, radius = 3.5 cm.



3. Find the diameter of a circle whose radius is 1.5 cm.

Solution:

We know, Diameter = 2 radius.

Radius = 1.5 cm.

= 2 x 1.5 cm.

= 3 cm.

Therefore, diameter = 3 cm.



4. Find the radius of a circle whose diameter is 8 cm.

Solution:

We know, Radius = Diameter/2

Diameter = 8 cm.

= 8/2 cm.

= 4 cm.

Therefore, radius = 4 cm.



5. Find the diameter of a circle whose radius is 2 cm.

Solution:

We know, Diameter = 2 radius.

Radius = 2 cm.

= 2 x 2 cm.

= 4 cm.

Therefore, diameter = 4 cm.



Relation between Circumference and Diameter:

What is the relation between circumference and diameter?

Solution:

Circumference of a circle is slightly more than three times of its diameter.

Related Links:



Circle

  • Relation between Diameter Radius and Circumference.
  • Worksheet on Circle.
  • Practice Test on Circle.




  • 5th Grade Geometry Page

    5th Grade Math Problems

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