1. Measurement AreaWhat will we learn today? concepts of area
and perimeter of a plane figure measurement of area in square units
measurement of area in square centimetres
2. What is Area?Area is the size of a surface.
3. Area of Simple ShapesThere are special formulas for certain
shapes:For example: What is the area of this rectangle? 3cm
5cm
4. Area of Simple ShapesThere are special formulas for certain
shapes:For example: What is the area of this rectangle? Area =
Length x Breadth 3cm 5cm
5. Area of Simple Shapes What is the area of this rectangle?
Area = Length x BreadthLength is the longest dimension of an
object. 3cm Length 5cm
6. Area of Simple Shapes What is the area of this rectangle?
Area = Length x BreadthBreadth is the extent or measure of how
broador wide something is. Breadth 3cm 5cm
7. Area of Simple Shapes What is the area of this rectangle?
Area = Length x BreadthLength is the longest dimension of an
object.Breadth is the extent or measure of how broador wide
something is. Breadth 3cm Length 5cm
8. Area of Simple ShapesTherefore, by applying the formula.
What is the area of this rectangle?Area of rectangle = Length x
Breadth 3cm 5cm
9. Area of Simple ShapesTherefore, by applying the formula.
What is the area of this rectangle?Area of rectangle = Length x
Breadth = 5cm x 3cm 3cm 5cm
10. Area of Simple ShapesTherefore, by applying the formula.
What is the area of this rectangle?Area of rectangle = Length x
Breadth = 5cm x 3cm = 15 cm 3cm 5cm
11. Area of Simple ShapesTherefore, by applying the formula.
What is the area of this rectangle?Area of rectangle = Length x
Breadth = 5cm x 3cm Notice the = 15 cm difference in units? 3cm
5cm
12. Area of Simple ShapesTherefore, by applying the formula.
What is the area of this rectangle?Area of rectangle = Length x
Breadth = 5cm x 3cm = 15 cm The unit for AREA is cm or m
13. SummaryYou can only find area when the length andbreadth
have the same units.For example,the length is 5 cm and the breadth
is 4 cm.The area will be 20 cm.
14. SummaryYou can only find area when the length andbreadth
have the same units.For example,the length is 5 m and the breadth
is 4 m.The area will be 20m.
15. Study Figures A and B carefully.
16. We need to count the number of squares inorder to find the
area of Figures A and B.
17. Lets look at Figure A. 1 2 3 4 5 6 77 complete
squares.
18. Lets look at Figure A. 2 triangles form 1 1 complete 2
square. 3 4 5 6 77 complete squares.
19. Figure A is made up of 8 complete squares.
20. Lets look at Figure B. 10 complete squares. 1 6 2 7 3 8 4 9
5 10 2 triangles form 1 complete square.
