Perimeter of Common Shapes

Perimeter of Common Shapes

By Veronica Borja

​How can you find the perimeter of common shapes?

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​WHAT I KNOW ABOUT A SQUARE:

• It has 4 sides

• All sides are the same length

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What is the perimeter of this square?

​What other shapes have all equal sides?

​Equilateral Triangle

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What is the perimeter of this rhombus?

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What is the perimeter of this equilateral triangle?

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​WHAT I KNOW ABOUT THE SIDES OF A RECTANGLE:

• It has 4 sides

• Opposite sides have the same length​

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What is the perimeter of this rectangle?

​WHAT I KNOW ABOUT THE SIDES OF AN ISOSCELES TRIANGLE:

• It has 3 sides

• Two sides have the same length​

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What is the perimeter of this isosceles triangle?

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CHALLENGE:

This star has all equal sides. What is its perimeter?