1 / 15

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.

missy
Download Presentation

Perimeter Of Sha p es.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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

More Related