1 / 9

Area Of Sha p es.

2cm. 12m. A1. A2. 7cm. 10m. 5cm. A1. 3cm. 12cm. A2. 16m. 8cm. Area Of Sha p es. 1cm 2. 1cm. 1cm. 1cm 2. 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.

minty
Download Presentation

Area 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 Area Of Shapes.

  2. 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 centimetres. A square centimetre is a square measuring one centimetre in each direction. It is written as :

  3. B A C D Estimating The Area. Look at the four shapes below and use your judgement to order them from smallest to largest area:

  4. B A C D To decide the order of areas consider the four shapes again: To measure the area we must determine how many square centimetres are in each shape: Each shape is covered by 36 squares measuring a centimetre by a centimetre .We can now see that all the areas are equal at 36cm2 each.

  5. Height Base C Area Of A Rectangle. Look again at one of the shapes whose area we estimated: What was the length of the base of the rectangle ? 9cm How many rows of 9 squares can the height hold ? 4 We can now see that the area of the rectangle is given by 9 x 4. The formula for the area of a rectangle is: or A(rect) = b x h Area of a Rectangle = Base x Height

  6. We can now calculate the area of each rectangle very quickly: (1) (2) (3) (4) A(rect) = b x h = 12 x 3 =36cm2 A(rect) = b x h = 6 x 6 = 36cm2 A(rect) = b x h A(rect) = b x h = 18 x 2 =36cm2 = 9 x 4 =36cm2

  7. (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(rect) = b x h Solution A(rect) = b x h = 7 x 4 = 3 x 5 = 28cm2 = 15m2

  8. 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

  9. (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

More Related