made a picture of an aeroplane with coloured paper as shown in figure. Find the
total area of the paper used.

For part I :

It is a triangle with sides 5 cm, 5 cm and 1 cm.

Thus, We know that,

Now, Area of part I triangle

=

(Since, Heron's formula [area =

=

=

=

For part II :

It is a rectangle with sides 6.5 cm and 1 cm

(Since, Area of rectangle = Lenght × Breadth)

= 6.5

For part III :

It is a trapezium ABCD.

(Since, Area of triangle =

Now, Area of trapezium

=

=

=

=

= 3 × 0.433

= 1.299

Therefore, Area of part III is 1.299

For part IV & V :

Both the parts IV and V are the same.

Area of part IV & V =

So, we get,

Total area of paper used = Area of (I + II + III + IV + V)

= (2.487 + 6.5 + 1.299 + 4.5 + 4.5)

= 19.286

= 19.3