AREA

Can you find the areas of figures?

6cm

3cm 4cm

4cm

2cm

5cm 4cm

3cm

A B

PD C

Q

Area of Triangle

The area of the triangle ∆ABP = — x AB x PQ

= — x AB x CB

= — x Area of rectangle ABCD

121212

5cm

4cm

M1

M2

A BA

RRQP

M1

M2

A B

RRQP

‘Triangle with same base and between the same parallels are of equal area’

‘Triangle with same base and between the same parallels are of equal

area’

APPLICATION OF THIS THEOREM Can we draw a triangle with the same area

as the triangle ABC shown below, but with the angle at A, aright angle?

C

BA

C

BA

D

Here ∆ ABD is the required triangle

Try it also..

o Draw ∆ ABC with AB = 4cm, BC = 5cm and CA =6cm

Draw an isosceles triangle of same area with one side as AB itself.

o Draw ∆ ABC as in the above problem. Draw triangle of same area with two of its sides 6cm and 7cm.

Thank you

Basil Roy IdicullaMathematical scienceMount Tabor Training College Pathanapuram