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Perimeter Of Sha p es.

2cm. 12m. A1. A2. 7cm. 10m. 5cm. A1. 3cm. 12cm. A2. 16m. 8cm. Perimeter Of Sha p es. What Is Perimeter ?. Perimeter is the distance around a shape. Think of a fence. 9cm. 4cm. 4cm. 9cm. For example:. Perimeter = 4 + 9 + 4 + 9 = 26 cm. 2cm. 12m. A1. A2. 7cm. 10m. 5cm.

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Perimeter Of Sha p es.

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  1. 2cm 12m A1 A2 7cm 10m 5cm A1 3cm 12cm A2 16m 8cm Perimeter Of Shapes.

  2. What Is Perimeter ? Perimeter is the distance around a shape. Think of a fence. 9cm 4cm 4cm 9cm For example: Perimeter = 4 + 9 + 4 + 9 = 26 cm

  3. 2cm 12m A1 A2 7cm 10m 5cm A1 3cm 12cm A2 16m 8cm Area Of Shapes.

  4. 1cm2 1cm 1cm 1cm2 What Is Area ? Area is the amount of space inside a shape: Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area Area is measured in square units. A square unit is a square measuring one unit in each direction. For example: It is written as :

  5. Width Length C A = LW for short. Area Of A Rectangle. The formula for the area of a rectangle is: Area = Length x Width or

  6. (1) (2) 4cm 5m 7cm 3m 1m 1m Example 1 Calculate the area of the rectangle below: Solution This area is in square metres: A = LW Solution A = LW L = 7 W = 4 L = 3 W = 5 A = 7 x 4 A = 3 x 5 A = 28cm2 A = 15m2

  7. 2cm 5cm A1 A1 3cm A2 A2 8cm Example 3. Solution. Split the shape up into two rectangles: Calculate the area of A1 and A2. 2 3 5 6 Calculate the area of the shape above: Area = A1 + A2 Area = ( 2 x 5) + (6 x 3) Area = 10 + 18 Area = 28cm2

  8. (1) (2) 6cm 2.7m 8cm 4.2m 17cm (3) 5cm 12cm 8cm What Goes In The Box ? Find the area of the shapes below : 48cm2 11.34m2 141cm2

  9. 5cm Height 8 cm Base The Area Of A Triangle. Consider the right angled triangle below: What shape is the triangle half of ? The formula for the area of a triangle is: Rectangle Area = ½ x Base x Height What is the area of the rectangle? A = ½ BH Area = BH

  10. 6cm 3.2m 10cm 6.4m Calculate the areas of the triangles below: Example 1 Example 2 Solution. Solution. Area = ½ x base x height Area = ½ x base x height height = 6cm base = 10 cm height = 3.2m base = 6.4m Area = ½ x 10 x 6 Area = ½ x 6.4 x 3.2 Area = ½ x 60 = 30cm2 Area = ½ x 20.48 = 10.24m2

  11. 12m 10m A1 A1 16m A2 A2 Example 3. Calculate the area of the shape below: Solution. Divide the shape into parts: Area = A1 + A2 10 10 12 16-12 =4 Area = LW + 1/2 BH Area = 10 x 12 + ½ x 4 x 10 Area = 120 + 20 Area = 140m2

  12. (1) (2) 6.3m 10cm 10.2 m 8cm 18m (3) 12m 25m What Goes In The Box ? Find the area of the shapes below : 40cm2 32.13m2 258m2

  13. The Area Of A Parallelogram. A Parallelogram is any closed shape which has two sets of parallel sides.

  14. We are now going to find a formula for the area of a parallelogram: Divide the shape into parts: h b Area = b x h Height and Base have to be perpendicular

  15. 13cm 16cm Example 1 Calculate the area of the parallelogram below : Solution ( Using the formula). Area = b x h b = 16 h =13 Area = 16 x 13 Area = 208 cm2

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