The distance around the outside of a shape.

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Presentation transcript:

The distance around the outside of a shape. Perimeter The distance around the outside of a shape.

The distance around the outside of a rectangle. Perimeter The distance around the outside of a rectangle.

Perimeter To find the perimeter you need to measure the length of each side of the rectangle. then add them together.

Measure each side of the triangle then add them together. Perimeter Measure each side of the triangle then add them together.

Circumference The distance around the outside of a circle. Distance across middle. Diameter Distance from middle to circumference. Radius

The distance around the outside of a rectangle. Perimeter The distance around the outside of a rectangle. length width width length Perimeter = (2 x L) + (2 x W)

Perimeter Do you have to measure every side to find the perimeter of these shapes?

Perimeter Word Problems

A regular pentagon has one side 25cm long A regular pentagon has one side 25cm long. How long is the perimeter of this shape?

2. A regular hexagon has a perimeter of 300cm 2. A regular hexagon has a perimeter of 300cm. How long is the length of one side?

2. A Hexagon has a perimeter of 300cm 2. A Hexagon has a perimeter of 300cm. How long is the length of one side?

3. A square field has a perimeter of 1200m 3. A square field has a perimeter of 1200m. How long is the length of each side of the field? One side of the field is hedged. What length of fencing is needed to fence in the other three sides?

What is the perimeter of a square of side 20cm?

If the perimeter of square is 200cm If the perimeter of square is 200cm. What is the length of one of the sides?

What is the perimeter of an equilateral triangle of side 8.9cm?

A regular heptagon has a side length of 26cm. What is it’s perimeter?

A rectangle has a perimeter of 68cm. It’s short side is 10cm A rectangle has a perimeter of 68cm. It’s short side is 10cm. What is the length of the long side?