Draw a pie chart representing the distribution of students across different subjects. The number of students in each subject is as follows: Mathematics (45), Physics (39), Chemistry (28), Biology (14)

Total students = Mathematics + Physics + Chemistry + Biology + Economics + History

$$\text{Total students} = 45 + 39 + 28 + 14 + 36 + 18 = 180$$

The angle for each subject is calculated as $(\text{Number of students for subject} / \text{Total students}) \times 360^\circ$.

• Mathematics:

$$\frac{45}{180} \times 360^\circ = \frac{1}{4} \times 360^\circ = 90^\circ$$

• Physics:

$$\frac{39}{180} \times 360^\circ = 39 \times 2^\circ = 78^\circ$$

• Chemistry:

$$\frac{28}{180} \times 360^\circ = 28 \times 2^\circ = 56^\circ$$

• Biology:

$$\frac{14}{180} \times 360^\circ = 14 \times 2^\circ = 28^\circ$$

• Economics:

$$\frac{36}{180} \times 360^\circ = \frac{1}{5} \times 360^\circ = 72^\circ$$

• History:

$$\frac{18}{180} \times 360^\circ = \frac{1}{10} \times 360^\circ = 36^\circ$$

The pie chart would be drawn with sectors corresponding to these angles:
Mathematics: $\boxed{90^\circ}$
Physics: $\boxed{78^\circ}$
Chemistry: $\boxed{56^\circ}$
Biology: $\boxed{28^\circ}$
Economics: $\boxed{72^\circ}$
History: $\boxed{36^\circ}$