PHY1: AREA

This Unit is about the Area as calculated in Olevel Physics.

AREA

Area is the region under or within a boundary of an object. Area is measured in square units e.g. cm3, m2, mm2.

Where

1km2 =? m2

[1km]2 = [1000m]2

1km2 = 1000m x 1000m

1km2 = 1,000,000m2

 

And

1m2 =? cm2

[1m] 2 = [100cm]2

1m2 = 1000cm x 100cm

1m2 = 10,000cm2

 

FORMULAE FOR FINDING AREA OF OBJECTS

Object

TRIANGLE

 

Formulae

1/2  x b x h

 

Rectangle

rectangle

 

Formulae

  Length x width

 

Square

parallelogram

 

formulae

 

Formulae

1/2 x r2

 Quadrant

figure

 

Formulae

1/4 x r2

 

SURFACE AREA

It is the total area around the surface of an object. It is obtained by either adding up the area of the faces on using formulae.

EXAMPLES

cube

 

cylinder

 

Formulae

2 x r2   = [r +h]

sphere

 

xr2

prism

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ASSIGNMENT : AREA assignment MARKS : 10  DURATION : 1 week, 3 days

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