Area of Shapes n The area of a

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Area of Shapes n The area of a shape is the space it occupies.

Area of Shapes n The area of a shape is the space it occupies. n Write down the name of each shape. A powerpoint presentation by Carmelo Ellul Head of Department (Mathematics) Parallelogram Trapezium Square Rectangle Triangle Circle

Area of Shapes n Click button to select topic. Square Rectangle Parallelogram Triangle Trapezium

Area of Shapes n Click button to select topic. Square Rectangle Parallelogram Triangle Trapezium Circle End Show

The Square Area = l x b b breadth length e. g. Find the

The Square Area = l x b b breadth length e. g. Find the area of a square of side 3. 5 cm. A = l x b Discuss and work out A = 3. 5 this cmexample x 3. 5 cm together = with 12. 25 your cm 2 friend.

The Rectangle Area = l x b b l e. g. Find the area

The Rectangle Area = l x b b l e. g. Find the area of a rectangle of length 3. 5 cm and height 80 mm. Since units must be the same: 10 mm = 1 Discuss cm 80 mm and = 80 work mm ÷out 10 = 8 cm this example A = l x b together. A = 3. 5 cm x 8 cm = 28 cm 2

The Parallellogram Area = b x h e. g. Find the area of a

The Parallellogram Area = b x h e. g. Find the area of a parallelogram correct to 1 d. p. h height b base 3. 8 cm 10. 3 cm A = b. Discuss xh A= 10. 3 cm out x 3. 8 cm and work =this 39. 14 cm 2 example = 39. 1 cm 2 together. h b

The Triangle Area = ½ b h h height e. g. Find the area

The Triangle Area = ½ b h h height e. g. Find the area of triangle ABC correct to the nearest cm 2. A b base 4 cm B 11. 7 cm C A = ½b xh Discuss A= ½ work x 4 cmout x 11. 7 cm h and =this 23. 4 cm 2 example b = 23 cm 2 together. Area of parallelogram = ½b ½ area h of= parallelogram b h

The Trapezium Area = ½h(a + b) e. g. Find the area of the

The Trapezium Area = ½h(a + b) e. g. Find the area of the trapezium. Length aof side a 8. 5 cm height h 6 cm Length bof side b a h 12 cm b h = 6 cm, a = 8. 5 cm, b = 12 cm A about = ½h(athe + b) Decide values A = ½ x 6 of cma, xb(8. 5 andcm h + 12 cm) = ½ x to 6 cm findx the 20. 5 area. cm a b = 61. 5 cm 2 Area The Rotate Copy Area of 2 the of 1 trapeziums the trapezium parallelogram trapezium form is=half ½ a=h(a parallelogram h(a+ +b)b)

The Circle Area = p r 2 Radius r Centre Remember: the radius of

The Circle Area = p r 2 Radius r Centre Remember: the radius of a circle is half the diameter. e. g. The diameter of a circle is 19 cm. Find, correct to nearest whole number, the area of a circle. r = 19 cm ÷ 2 = 9. 5 cm. Find the radius first 2 A =and p rthen work out example = pthis x 9. 5 cm together. = 283. 5 cm 2 = 284 cm 2

The Circle Area = p r 2 r e. g. The diameter of a

The Circle Area = p r 2 r e. g. The diameter of a circle is 19 cm. Find, correct to nearest whole number, the area of a circle. r = 19 cm ÷ 2 = 9. 5 cm. A = p r 2 Remember: the radius of a circle is half the diameter. = p x 9. 5 cm = 283. 5 cm 2 = 284 cm 2 End Show