## Table of Contents

- [Area notes](#area-notes)
  - [Summary](#summary)
  - [Data and formula](#data-and-formula)
- [Motion notes](#motion-notes)
  - [Summary](#summary-1)
  - [Data and formula](#data-and-formula-1)

# Area notes

## Summary

For a triangle, use the base and its perpendicular height.[^source]

## Data and formula

| Base (cm) | Height (cm) | Area (cm²) |
| --- | --- | --- |
| 6 | 4 | 12 |

$$
A = \frac{bh}{2} = \frac{6 \times 4}{2} = 12
$$

The area is expressed in square centimetres, not centimetres.[^unit]

[^source]: These numbers are self-authored teaching examples, not experimental measurements.
[^unit]: Area uses square units.


---

# Motion notes

## Summary

For uniform motion, divide distance by elapsed time.[^doc2x-footnote-1]

## Data and formula

| Distance (m) | Time (s) | Speed (m/s) |
| --- | --- | --- |
| 20 | 4 | 5 |

$$
v = \frac{d}{t} = \frac{20}{4} = 5
$$

The unit is metres per second, not metres.[^doc2x-footnote-2]

[^doc2x-footnote-1]: These numbers are self-authored teaching examples, not experimental measurements.
[^doc2x-footnote-2]: Speed uses distance divided by time.