Area & Perimeter Area of a rectangle = Area of a triangle = Area of a parallelogram = Area of a trapezium =

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Presentation transcript:

Area & Perimeter Area of a rectangle = Area of a triangle = Area of a parallelogram = Area of a trapezium =

Area & Perimeter Area of a rectangle = length x Breadth Area of a triangle = Area of a parallelogram = Area of a trapezium =

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 =

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 =

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

Area & Perimeter Area of a circle = Circumference of a circle =

Area & Perimeter Area of a circle =  r 2 Circumference of a circle =

Area & Perimeter Area of a circle =  r 2 Circumference of a circle =  D or 2  r

Example Calculate the area for each of the following shapes (i) 7.4cm 8.2cm 9.3cm

(ii) 8cm 5cm

(iii) (iv) 12cm 3.2m

(v) 9cm 13cm 7cm

Example Calculate the shaded region in the shape below 25m 13m

Example The area of a circle is given as 205 m 2. What is its diameter?

5cm Example Work out the circumference for each of the following circles (a)(b) 17mm

45m Example Work out the perimeter of the semi circle drawn below

Example Work out the radius of a circle which has an circumference of 30 centimetres.

18cm 5cm Example Which has the largest perimeter?