Circle Calculator

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**Step 1 :**

**Step 2 :**

Circle Calculator is an online tool used to find the diameter, area and circumference of a circle.

Circle is defined as the set of points that is at an equal distant from the centre of the circle. The circle can drawn by a complete revolution of 360° from a single point called the centre without changing the radius.

Circle is defined as the set of points that is at an equal distant from the centre of the circle. The circle can drawn by a complete revolution of 360° from a single point called the centre without changing the radius.

The units of length that will not affect the calculations. The unit remains same for diameter and circumference of a circle, only it defer for area of a circle (i.e. from unit to unit square). Any other base unit can be substituted.

**Circle Formula's**

**Diameter of a Circle**

d = 2r

Where d = diameter and r = radius

**Area of a Circle**

A = $\pi$r^{2}

Where A = area, r = radius and $\pi$ value = 3.142

**Circumference of a Circle**

C = 2$\pi$r

Where C = circumference, r = radius and $\pi$ value = 3.142

Put the values in the above formula's and solve it further.

The radius of a circle is 6 cm. Figure the diameter, area and circumference of that circle?

**Step 1 :**Given: r = 6 cm

**Diameter of a Circle**

d = 2r

Where d = diameter and r = radius

**Area of a Circle**

A = $\pi$r

^{2}

Where A = area, r = radius and $\pi$ value = 3.142

**Circumference of a Circle**

C = 2$\pi$r

Where C = circumference, r = radius and $\pi$ value = 3.142

**Step 2 :**Put the values in the above formula's and solve it further.

**Diameter of a Circle**

d = 2 * 6

= 12 cm

**Area of a Circle**

A = $\pi$6

^{2}

A = 3.142 * 36 cm

^{2}

A = 113.09 cm

^{2}

**Circumference of a Circle**

C = 2$\pi$6

C = 2 * 3.142 * 6

C = 37.69 cm

**Answer :****Diameter of the Circle**= 12 cm**Area of Circle**= 113.09 cm^{2}**Circumference of a Circle**= 37.69 cmThe radius of a circle is 11 cm. Figure the diameter, area and circumference of that circle?

**Step 1 :**Given: r = 11 cm

**Diameter of a Circle**

d = 2r

Where d = diameter and r = radius

**Area of a Circle**

A = $\pi$r

^{2}

Where A = area, r = radius and $\pi$ value = 3.142

**Circumference of a Circle**

C = 2$\pi$r

Where C = circumference, r = radius and $\pi$ value = 3.142

**Step 2 :**Put the values in the above formula's and solve it further.

**Diameter of a Circle**

d = 2 * 11

= 22 cm

**Area of a Circle**

A = $\pi$11

^{2}

A = 3.142 * 121 cm

^{2}

A = 380.13 cm

^{2}

**Circumference of a Circle**

C = 2$\pi$11

C = 2 * 3.142 * 11

C = 69.11 cm

**Answer :****Diameter of the Circle**= 22 cm**Area of Circle**= 380.13 cm^{2}**Circumference of a Circle**= 69.11 cm