Find the circumference and area of a circle with a radius of 12cm.

In order to find the circumference and area of a circle, if we know that its radius is 12 cm. And we are also told in the condition that the value of the number n should be rounded to tenths n = 3.14.

Let’s start by recalling the formula for calculating the circumference of a circle in terms of its diameter. So the formula looks like this:

C = 2пR, substitute the values and calculate:

C = 2 * 3.14 * 12 = 75.36 cm circumference.

To calculate the area of a circle bounded by a circle:

S = nR ^ 2;

S = 3.14 * 12 ^ 2 = 3.14 * 144 = 452.16 cm ^ 2.