The following table shows some of the data gathered by a company on average water usage in homes - Leaving Cert Mathematics - Question 8 - 2016

To find the angles corresponding to each percentage in the pie chart, we use the formula:

$\text{Angle} = \left( \frac{\text{Percentage}}{100} \right) \times 360$

• For WC flushing: $\left( \frac{30}{100} \right) \times 360 = 108°$

• For Personal Washing – Baths and Taps: $\left( \frac{21}{100} \right) \times 360 = 75.6°$

• For Personal Washing – Showers: $\left( \frac{12}{100} \right) \times 360 = 43.2°$

• For Clothes Washing: The angle is already provided: 46°-8°

• For Other: $\left( \frac{24}{100} \right) \times 360 = 86.4°$

The completed table of angles is:

To construct the pie chart:

1. Draw a circle with an appropriate radius.
2. Create sectors corresponding to the angles calculated:
   • 108° for WC flushing
   • 75.6° for Personal Washing – Baths and Taps
   • 43.2° for Personal Washing – Showers
   • 46°-8° for Clothes Washing
   • 86.4° for Other
3. Label each sector with the corresponding activity name and angle.

Ensure:

• All angles are drawn correctly.
• Each section is appropriately labeled with the name of the activity and the size of the angle.