Area

1
Area Perimeter

• Area of a rectangle
• Area of a triangle
• Area of a parallelogram
• Area of a trapezium

2
Area Perimeter

• Area of a rectangle length x Breadth
• Area of a triangle
• Area of a parallelogram
• Area of a trapezium

3
Area Perimeter

• Area of a rectangle length x Breadth
• Area of a triangle ½ x base x perpendicular
• height.
• Area of a parallelogram
• Area of a trapezium

4
Area Perimeter

• Area of a rectangle length x Breadth
• Area of a triangle ½ x base x perpendicular
• height.
• Area of a parallelogram base x perpendicular
• height
• Area of a trapezium

5
Area Perimeter

• Area of a rectangle length x Breadth
• Area of a triangle ½ x base x perpendicular
• height.
• Area of a parallelogram base x perpendicular
• height
• Area of a trapezium ½(a b)h

6
Area Perimeter

• Area of a circle
• Circumference of a circle

7
Area Perimeter

• Area of a circle ?r2
• Circumference of a circle

8
Area Perimeter

• Area of a circle ?r2
• Circumference of a circle ?D or 2?r

9
Example Calculate the area for each of the
following shapes (i)
10

• (ii)

11

• (iii) (iv)

12

• (v)

13

• Example
• Calculate the shaded region in the shape below

13m
25m
25m
14

• Example
• The area of a circle is given as 205 m2. What is
  its diameter?

15
Example Work out the circumference for each of
the following circles
(a) (b)
5cm
16
Example Work out the perimeter of the semi circle
drawn below
17
Example Work out the radius of a circle which has
an circumference of 30 centimetres.
18
Example Which has the largest perimeter?