a circle has radius 3cm. what is the circumference?

Step 1: Recall the formula for circumference

The circumference of a circle, denoted by $C$, is the distance around the circle. The formula to calculate the circumference is $C = 2\pi r$, where $r$ is the radius of the circle and $\pi$ (pi) is a mathematical constant approximately equal to $3.14159$.

Step 2: Substitute the given radius

We are given that the radius $r$ of the circle is $3 \text{ cm}$. We substitute this value into the circumference formula.

Step 3: Calculate the circumference

Now, we multiply the numbers together: $2 \times 3 = 6$. So, the circumference of the circle is $6\pi \text{ cm}$. We leave $\pi$ in the answer unless a specific numerical approximation is requested.

More from this chapter

• A rectangular garden is 23 m long and 17 m wide. A path 2.5 m wide runs all around the outside of the garden. Find the area of the path.
• The radius is 6 m 6 m then what is diameter
• A square of side 8 cm has a smaller square of side 3 cm cut out from one corner. Sketch the resulting shape and find the area of the remaining figure.
• Find the area of a triangle with base 10 cm and height 6 cm
• Find the area of a circle with radius 7 cm
• Emma wants to put a lace ribbon around the edge of a rectangular table. The table has a length of 12 cm and a width of 8 cm.How many centimeters of ribbon does
• Calculate the area of a rectangle with a length of 12 cm and a width of 4 cm.
• 2. Calculate the area of a rectangle with a length of 12 cm and a width of 4 cm.

All Perimeter and Area solutions →