HSC Standard Maths Resources

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6.1 Perimeter

Perimeter is the size of the length that surrounds a shape. There are a bunch of perimeter formulae for some common shapes that you need to be familiar with:

  • Perimeter of circle: 2πr
  • Perimeter of semi-circle: πr
  • Perimeter of square: 4a (where a is length of each side)
  • Perimeter of rectangle: 2 × (length + width)
  • Perimeter of triangle: sum of the three sides.

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Example 1

Calculate the perimeters of the following shapes.

The following is the type of questions you can expect in exam:

6.1.1 Exam Question Type 1

Study notes of this section and other resources can be accessed here:

6.1.2 Study Notes & Resources

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