Perimeter & Circumference
Introduction
Perimeter is defined as the distance around a two-dimensional shape. Circumference is what we call the perimeter of a circle. We can use perimeter and circumference to find the distances around everyday objects like houses, gardens, and pools.
In this worksheet you will find the perimeter of different objects and you will see how the length of the radius of a circle affects the circumference.
Perimeter Formulas
Find the perimeter of...
Susie wants to plant a rectangular garden. The length of the garden will be 7 feet and the width will be 4.5 feet. What is the perimeter in feet?
Below is a circle with a marked center and a point on the circle. A'A (f) is the radius. Using the slider, you can adjust the size of the circle, which in turn, adjusts the circumference.
Find the circumference if the ratio = 2.5.
If the ratio = 2, the radius = 2.78 units.
Circumference
Circumference
If the ratio = 2.5, what is the circumference of the circle?
Triangle Perimeter
Move the slider to adjust the lengths of the triangle. The increasing lengths will increase the perimeter value.
What is the perimeter of Triangle CDE when the ratio =-1.75?
Quiz
What is the formula for circumference of a circle?
Pool Perimeter
Jay wants to know the perimeter of his new pool. If the pool is a rectangle, and the width is 6 m and the length is 10 m, what is the perimeter?
Rachel's new puzzle is a square. One side length is 12 inches. What is the perimeter?