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Bookmark or Share- Perimeter | Brilliant Math & Science WikiThe perimeter of a two-dimensional figure is the length of the boundary of the figure. If the figure is a polygon such as a triangle, square, rectangle, pentagon, etc., then the perimeter is the sum of the edge lengths of the polygon. For example, a square with side length 3 has perimeter 3+3+3+3 = 12. 3+3+3 +3 = 12.
- Perimeter - Math is FunPerimeter is the distance around a two-dimensional shape. Example: the perimeter of this rectangle is 7+3+7+3 = 20. Example: the perimeter of this regular pentagon is: 3 + 3 + 3 + 3 + 3 = 5×3 = 15. The perimeter of a circle is called the circumference: Circumference = 2 π × radius. Perimeter Formulas. Try It Yourself. Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10
- Area and perimeter | Geometry (all content) | Math | Khan AcademyLearn. Intro to area and unit squares. Measuring rectangles with different unit squares. Measuring area with partial unit squares. Creating rectangles with a given area 1. Creating rectangles with a given area 2. Practice. Find area by counting unit squares. 7 questions. Practice. Find area with partial unit squares. 7 questions. Practice.
- Perimeter - Math.netBelow are formulas for the perimeters of some common geometric figures. Square. The perimeter of a square with side length s is: P = 4s. Rectangle. The perimeter of a rectangle with length, l, and width, w, is. P = 2l + 2w. Equilateral triangle. The perimeter of an equilateral triangle with side lengths s is: P = 3s. Regular polygon
- Perimeter & area (video) | Perimeter | Khan AcademyPerimeter is the distance around the outside of a shape. For example, if you walk around the edge of a playground, you're measuring its perimeter. Area is the amount of space inside a shape. For example, if you want to put new tiles on your kitchen floor, you need to know the area of the room to know how many tiles to buy. Created by Sal Khan.
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