If a circle has a diameter of 10 cm, what is its circumference using \( \pi \\)?

To find the circumference of a circle, you can use the formula \( C = \pi \times d \), where \( d \) is the diameter. Given that the diameter is 10 cm, the calculation would be \( C = \pi \times 10 \). Thus, the circumference is \( 10\pi \) cm. Did you know that the concept of the circle and its properties has been around for thousands of years? Ancient civilizations like the Egyptians and Greeks used the circle in various fields from architecture to astronomy, appreciating its symmetry and perfection! In practical terms, understanding the circumference helps in numerous real-world scenarios. For instance, if you're planning to make a circular garden or a pizza, knowing the circumference can help you calculate the materials needed or the area of your circular space! So next time you slice into that pizza, remember the geometry behind it!