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1. Unit 13
Areas
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area

2. Unit 13
Areas
Formula for Area

3. Square
Area = a x a = a2Area = a x a = a2
Side: a

4. Rectangle
Area = a x b = abArea = a x b = ab
Sides: a, b

5. Triangle
Area =Area =
Base: b
Perpendicular height: h

6. Complete the table
? ?
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3 cm
5 cm
12 cm
6 cm

7. Complete the table
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??
?

8. Unit 13
Areas
You have finished viewing:
Formula for Area
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums, Parallelograms and Kites
Presentation 4 Surface Area

9. Unit 13
Areas
Areas and Circumferences of
Circles

10. Area:
or
Area:
or
Circle
Radius: r
Diameter: d
Circumference:
or
Circumference:
or

11. Example Find the circumference and the
area of the circle with radius 4 cm
Circumference
Area
?
?
?
?
?

12. Unit 13
Areas
You have finished viewing:
Areas and Circumferences of Circles
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums,
Parallelograms and Kites
Presentation 4 Surface Area

13. Unit 13
Areas
Formulae for Areas of
Parallelograms, Trapeziums and
Kites

14. Parallelogram
Area = b x h = bhArea = b x h = bh

15. Trapezium
Area =Area =

16. Kite
Area =Area =

17. Complete the table
? ?
?
?
?
?
?

18. Unit 13
Areas
You have finished viewing:
Formula for Areas of Trapeziums,
Parallelograms and Kites
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums,
Parallelograms and Kites
Presentation 4 Surface Area

19. Unit 13
Areas
Surface Area

20. x
y
z
unfolds
to give
The surface area is:
Find the surface area of the cuboid with
sides 4 cm, 5 cm and 6 cm.
When x = 4, y = 5, z = 6
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?
?
?

21. Area of the circles
Area of the rectangle
Total surface area
r
h
unfolds
to give
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22. Area of the circles
Area of the rectangle
Total surface area
Find the surface area of a can of height 10 cm
and radius 3 cm
When r = 3 cm, h = 10 cm
?
?
? ?
???

23. Unit 13
Areas
You have finished viewing:
Surface Area
Return to front slide
Presentation 1 Formula for Area
Presentation 2 Areas and Circumferences of Circles
Presentation 3 Formula for Areas of Trapeziums,
Parallelograms and Kites
Presentation 4 Surface Area