# 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 = $$\frac{Diameter}{2}$$

For Example:

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

Solution:

We know, Diameter = 2 radius.

= 2 x 4.5 cm.

= 9 cm.

Therefore, diameter = 9 cm.

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

Solution:

Diameter = 7 cm.

= 7/2 cm.

= 3.5 cm.

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

Solution:

We know, Diameter = 2 radius.

= 2 x 1.5 cm.

= 3 cm.

Therefore, diameter = 3 cm.

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

Solution:

Diameter = 8 cm.

= 8/2 cm.

= 4 cm.

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

Solution:

We know, Diameter = 2 radius.

= 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.

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