Video and Examples
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To find the perimeter of this figure, you need to add the lengths of all 6 sides. Perimeter = 5 + 3 + 3 + 1 + 2 + 2 = 16 units |
The perimeter of a figure is the distance
around the outside of the figure. This is true whether the figure is a familiar figure like a rectangle or triangle, or if it is a complex figure like the floorplan of a house.
Since a rectangle has four sides with opposite sides being congruent, the formula for finding the perimeter is Side A + Side B + Side A + Side B. This could also be stated as 
or 
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To find the perimeter of a 4-by-6 rectangle you need to add the lengths of the four sides of the rectangle.
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Perimeter = Side A + Side B + Side C + Side D Perimeter = base + height + base + height Perimeter = 6 + 4 + 6 + 4 Perimeter = 20 units |
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What is the perimeter of this rectangle?
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Perimeter = Side A + Side B + Side C + Side D Perimeter = base + height + base + height Perimeter = 3 + 6 + 3 + 6 Perimeter = 18 units |
Self-Check
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Question 1 Find the perimeter of this figure.
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[show answer] |
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Question 2 Find the perimeter of this figure.
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[show answer] |
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Question 3 Find the perimeter of this figure.
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[show answer] |
