What is the definition of perimeter?

• A. Add up all sides of the shape
• B. Divide the area by the number of sides
• C. Measure the longest side of the shape
• D. Calculate the volume of the shape

Answer: (A)

The definition of perimeter refers to the total distance around the edges of a shape. To find the perimeter, you simply add up the lengths of all the sides of the shape together. This means measuring each side and then summing those measurements to get the total perimeter.

For example, if a rectangle has a length of 4 units and a width of 2 units, the perimeter would be calculated as 4 + 2 + 4 + 2 = 12 units. This process applies to various shapes, whether they are polygons like triangles, rectangles, or more complex shapes. Understanding perimeter is essential in geometry as it gives you an idea of the boundary length of a figure.