How is the perimeter of a two-dimensional shape calculated?

How is the perimeter of a two-dimensional shape calculated?

• A. Add the length of one side to the length of the opposite side
• B. Multiply the width by the height
• C. Add the lengths of all the sides together
• D. Divide the total area by the number of sides

Answer: (C)

The perimeter of a two-dimensional shape is calculated by adding the lengths of all its sides together. This process is straightforward: you measure each side's length and sum those measurements to find the total distance around the shape. This method applies to any polygon, whether it's a triangle, rectangle, or more complex figures; each side contributes to the overall boundary. In contrast to the other options, adding the length of one side to the opposite side does not account for the lengths of all sides, which is essential for accurately finding the perimeter. Multiplying the width by the height is a formula used for calculating area, not perimeter, and dividing the total area by the number of sides does not yield the perimeter either; instead, it mixes concepts of area with side counts, creating an incorrect interpretation of how to determine a shape's boundary.

The perimeter of a two-dimensional shape is calculated by adding the lengths of all its sides together. This process is straightforward: you measure each side's length and sum those measurements to find the total distance around the shape. This method applies to any polygon, whether it's a triangle, rectangle, or more complex figures; each side contributes to the overall boundary.

In contrast to the other options, adding the length of one side to the opposite side does not account for the lengths of all sides, which is essential for accurately finding the perimeter. Multiplying the width by the height is a formula used for calculating area, not perimeter, and dividing the total area by the number of sides does not yield the perimeter either; instead, it mixes concepts of area with side counts, creating an incorrect interpretation of how to determine a shape's boundary.