In geometry, knowing how to find the perimeter of a shape is important. The perimeter is the total distance around the outside of a shape. You can find it using simple formulas for different shapes. In this article, we will explain three easy ways to find the perimeter of common shapes like rectangles, squares, and circles.
3 Simple Methods to Calculate Perimeter
How to Find Perimeter in 3 Easy Ways
Finding the perimeter means adding up the lengths of all the sides of a shape. Here are three simple ways to do it:
- For Regular Shapes (Squares, Rectangles, Triangles)
- Add all the sides together.
- Example: A rectangle with sides 5 cm and 3 cm → 5 + 3 + 5 + 3 = 16 cm
- For Circles (Circumference)
- Use the formula C = 2πr (where r is the radius).
- Example: A circle with a radius of 4 cm → C = 2 × 3.14 × 4 = 25.12 cm
- For Irregular Shapes
- Measure and add up all the sides.
- Example: A shape with sides 4 cm, 6 cm, 3 cm, and 5 cm → 4 + 6 + 3 + 5 = 18 cm
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