# Ratio of the circumference of a circle to its diameter is denoted by symbol _______.

**Solution:**

Given, ratio of the circumference of a circle to its diameter is denoted by symbol _______.

We have to fill in the blanks with suitable answers to make the statement true.

Diameter = d

Radius = diameter/2

r = d/2

So, d = 2r

Circumference of circle = 2πr

Where, r is the radius of circle

Circumference = πd

Ratio of circumference to diameter = πd/d = π

Therefore, the ratio of the circumference of a circle to its diameter is denoted by symbol π.

**✦ Try This: **Find the diameter of the circle, if its circumference is 66 cm.

Given, circumference of a circle disc is 66 cm

We have to find the radius of disc

Circumference of circle = 2πr

Where, r is the radius of circle

66 = 2 × 22/7 × r

66 = 44/7 × r

3 = 2/7 × r

r = 3(7)/2

r = 21/2

r = 10.5 cm

Diameter, d = 2r

= 2(10.5)

= 21 cm

Therefore, the diameter is 21 cm.

**☛ Also Check: **NCERT Solutions for Class 7 Maths Chapter 11

**NCERT Exemplar Class 7 Maths Chapter 9 Problem 45**

## Ratio of the circumference of a circle to its diameter is denoted by symbol _______.

**Summary:**

Ratio of the circumference of a circle to its diameter is denoted by symbol π

**☛ Related Questions:**

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