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

Semi-perimeter of region I (triangle) **cm**

Using **Heron's formula, **Area of region I (triangle)

**(approx.)** ** (1)**

Area of region II (rectangle) = base height ** (2)**

Applying **Pythagoras theorem** on , we get

**(approx.)**

Semi-perimeter of region IV (

Using **Heron's formula, **Area of region IV (

** (3)**

Area of region V (triangle)=Area of region IV ( ** (4)**

Region III is trapezium but we do not know height of this trapezium. Let's draw this trapezium separately so we can find its area.

Draw and . Doing so, we will have ** cm** and **cm.**

We can use **Pythagoras theorem** on to find height of trpazezium PQRS.

**cm ** **(approx.)**

Area of region III (trapezium)

** (5)**

Adding **(1), (2), (3), (4)** and **(5)**, we get

**Area of aeroplane picture **