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# LENGTH - PowerPoint PPT Presentation

AREA. VOLUME. MASS. TIME. MEASUREMENT. LENGTH. CONTACT US. LENGTH. What is length? Length is a distance from one point to another point The standard unit for length is cm. Let us look at the example below. What is the height of the reptile?. HOME. ACTIVITIES. EXERCISE. LINKS. GAMES.

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## PowerPoint Slideshow about 'LENGTH' - cecilia-hess

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Presentation Transcript

AREA

VOLUME

MASS

TIME

MEASUREMENT

LENGTH

LENGTH

What is length?Length is a distance from one point to another pointThe standard unit for length is cm. Let us look at the example below.

What is the height of the reptile?

HOME

ACTIVITIES

EXERCISE

GAMES

SEARCH

### LEARNING OUTCOMES

At the end of the lesson, pupils should be able to :- state the different ways to measure length- state the different unit for length in the metric system- choose the appropriate measuring tools to measure length- measure length using the correct technique- record length in the standard units

MEASURING TOOLS

These are the measuring tools that we use to measure length. All the measuring tools shown are in the standard units.

ruler

measuring tape

measuring tape

Below are the ancient ways to measure

cubit

span

arm span

foot

stride

different people/creatures has different size of body parts

For example a man walk,

the pooh below also walk,

But all of them has different stride.

That is why cannot measure length by using our body parts

How to measure length?

Let us look at the pencil below?

The length of the ruler is 5 cm – 1 cm = 4 cm

AREA

What is area?Area is the total surface covered by the object. The standard unit of area is (squared centimetre) cm2. Can we measure the area of the below tennis court?

HOME

ACTIVITIES

EXERCISE

GAMES

SEARCH

Sure, we can measure the area of the tennis court.

LEARNING OUTCOMES

At the end of the lesson, pupils should be able to :- compare a square and a rectangle and guess which object has a bigger area- carry out a test to confirm their guesses- state that area = length X width- state the standard unit for area in the metric system- calculate the area of a given shape in standard unit

Picture below shows a 1 cm width and a 1 cm length of grids which then can be drawn as 4 cm width and 5 cm length. Moreover, area of an uneven shape can also be measured.

How to measure area of a rectangle?

length = a

width = b

Area of the blackboard is

a x b = ab

The unit is cm2

Now, let say a = 5 cm, b = 3 cm

Area, A = 5 x 3 = 15 cm2

• First, we have to identify the length and its width.
• Look at the blackboard below.

a

b

VOLUME

What is volume?Volume is a three dimensional space occupied by an object. The standard unit for volume is (cubed centimetre) cm3.

HOME

ACTIVITIES

EXERCISE

GAMES

Picture shows a 1cm x 1cm x 1cm cube and 7 cubes of the same size

SEARCH

LEARNING OUTCOMES

At the end of the lesson, pupils should be able to :- compare a cube and a cuboid and guess which object has a bigger volume- carry out a test to confirm their guesses- state that area = length X width X height- state the standard unit for volume in the metric system- calculate the volume of cubes and cuboids based on the measurements taken in standard unit

How to measure volume of a cube?

1. First, we have to identify the length, width and height of the cube.

2. Bearing in mind that the length, width and height of a cube is the same.

3. Look at the illustration. It shows the volume of a cube.

length = a

width = a

height = a

Volume of a cube is

a x a x a = a3

The unit is cm3

How to measure volume of a cuboid?

1. First, we have to identify the length, width and height of the cuboid.

2. Unlike cube, the length, width and heigth of a cuboid is different.

3. Look at the illustration. It shows the volume of a cuboid.

length = a

width = b

height = h

Volume of a cube is

a x b x h = abh

The unit is cm3

MASS

HOME

ACTIVITIES

EXERCISE

GAMES

SEARCH

TIME

HOME

ACTIVITIES

EXERCISE

GAMES

SEARCH

EXERCISES

HOME

LENGTH

AREA

VOLUME

HOME

http://www.factmonster.com/pages/unitconversion.html

http://www.accelware.com/Unit_Conversion_Tool/

http://www.aaamath.com/mea.html

http://www.onlineconversion.com/

http://www.math.com/tables/geometry/volumes.htm

http://findmeten.net/Math-Games/

http://education-place.info/1/324/Math/index.html

http://illuminations.nctm.org/ActivityDetail.aspx?ID=6

http://www.aaamath.com/mea.html

http://www.apples4theteacher.com/measure.html

www.animationlibrary.com

http://www.animation.com/eflp/0/pid106749/D363705/C0/PROVAHHA

http://www.gifanimations.com/action/ImageDisplay/1/57/3/next