Question

What is the circumference of a circle with a diameter of 14 centimeters?

Answer 1

C = 14π or in decimal rounded form 43.98

Explanation:

Circumference of a circle formula: C = 2*π*r

Step 1: Since they give us the diameter, we need to find the radius

radius = diameter/2

radius = 14/2

radius = 7

Step 2: Find the circumference

C = 2*π*(7)

C = 14π

C = 43.98

Answer: C = 14π or in decimal rounded form 43.98

Answer 2

Answer: 14π cm or 43.96 cm

Step-by-step explanation: To find the circumference of a circle, start with the formula for the circumference of a circle which is c = 2πr.

In this problem however, notice that we are given the diameter instead of the radius. To find the radius, remember that the radius of a circle is equal to half of the diameter so the radius of this circle will be equal to half of 14 centimeters or 7 centimeters.

Now to find the circumference, we plug 7 centimeters in for the radius in our formula and we have 2 π (7 cm) which simplifies to 14π cm.

So one way to write the circumference of the circle is 14π cm.

Now, remember that π is approximately equal to 22/7 or 3.14 so we can estimate the value of the circumference by plugging in 3.14 for π.

So we have 14(3.14) cm which simplifies to 43.96 cm.

So another way to write the circumference of the circle is 43.96 cm.