**What is Perimeter?**

Perimeter is the distance around a 2D shape.

To work out the perimeter, add up the lengths of all the sides.

**Perimeter of Triangle**

To find the perimeter of the given triangle, we’ll add the lengths of all the sides.

Perimeter = 3cm + 3cm + 3cm = 9cm

**Perimeter of rectangle**

To find the perimeter of the given rectangle, we’ll add the lengths of all the sides.

Perimeter = 3cm + 3cm + 2cm + 2cm = 10cm

**Perimeter of Square**

To find the perimeter of the given square, we’ll add the lengths of all the sides.

Perimeter = 4cm + 4cm + 4cm + 4cm = 16 cm

If the length of all the sides of a shape is the same, we can find the perimeter by multiplying the number of sides by the length.

**Let us try a question.**

To find the perimeter of the given pentagon, we’ll add the lengths of all the sides.

Perimeter = 7 cm + 7 cm + 7cm +7 cm + 7cm = 35cm

So, the perimeter of the given figure is 35cm.

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