How to Find Area and Perimeter?
Explained w/ 7+ Surefire Examples!

Throughout our study of mathematics, we have learned that perimeter is the distance around a flat, two-dimensional, shape, and area is the amount of space taken up by a flat, two-dimensional shape.

All this means is that the perimeter, or circumference, is the distance or length around a shape or object. And the area is the amount of space inside the object.

In today’s geometry lesson you’re going to review the formulas for finding area and perimeter of basic geometric shapes.

Let’s get started!

Now the four most basic two-dimensional shapes are:

• Square
• Rectangle
• Triangle
• Circle

The formulas for calculating perimeter and area are well known, but we will review them and discuss how they are used for each of the above-mentioned shapes. Also, please note that rather than saying, “perimeter of a circle,” we use the phrase circumference, as Math Planet accurately points out.

1. Square

2. Rectangle

3. Triangle

4. Circle

In the video lesson below we will cover harder examples using the given formulas to find the perimeter and area each shape. Additionally, we will plot points on the coordinate plane and learn how to find specified distances using the Pythagorean Theorem or the distance formula, as well as finding unknown measurements given the area of a two-dimensional shape.

Area and Perimeter Explained – Lesson & Examples (Video)

31 min

• Introduction to Perimeter and Area
• 00:00:23 – Formulas for Perimeter and Area of Squares, Rectangles, Triangles and Circles
• 00:06:17 – Find the perimeter, circumference, and area of each figure (Examples #1-4)
• Exclusive Content for Member’s Only

• 00:15:17 – Find the Area of each figure on the coordinate plane (Examples #5-6)
• 00:25:08 – Find the unknown measure given a figures area (Examples #7-9)
• Practice Problems with Step-by-Step Solutions
• Chapter Tests with Video Solutions