By definition of perimeter, the correct answer is option C. the perimeter of the square is 20 cm.
Definition of perimeter
The perimeter of a two-dimensional figure is the distance around the figure. That is, the perimeter of a flat geometric figure is called the length of its contour.
So, the perimeter is the measurement obtained as a result of the sum of the sides of a flat geometric figure. So to calculate the perimeter of a figure it is necessary to know two basic variables:
- The number of sides of the figure.
- The length of each of those sides.
Perimeter of a square
A square is a flat geometric figure that has four equal sides, so the expression to calculate the perimeter of a square is:
Perimeter= 4× length of the sides
This case
In this case, a square has a side length of 5 cm. So, the perimeter of the square is calculated as:
Perimeter= 4× 5 cm
Solving:
Perimeter= 20 cm
Finally, the correct answer is option C. the perimeter of the square is 20 cm.
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