Examples of finding perimeter of a shape involving circumfe

When calculating the perimeter of a shape that involves circumferences, like a circle, you use the formula \( P = 2\pi r \) where \( r \) is the radius. For instance, if you have a circle with a radius of 3 cm, the perimeter (circumference) would be \( P = 2 \times 3.14 \times 3 \approx 18.84 \) cm. In a real-world application, imagine designing a circular garden: knowing the circumference helps you determine how many meters of fencing you need. If you're constructing a circular pathway around your garden, using the perimeter formula ensures you have enough materials to create a lovely, complete loop!