The Geometrical Instrument - Divider

The geometrical instrument referred to in the question that has a pair of pointers is called a divider. It is a useful tool in geometry that is used to measure and transfer lengths and distances accurately.

Features of Dividers

- Pair of Pointers: The divider has two pointed legs or pointers that can be adjusted to different lengths to measure and transfer distances.
- Hinged Joint: The pointers are joined at the top by a hinge that allows them to move and adjust to different angles and positions.
- Locking Mechanism: The divider also has a locking mechanism that holds the pointers in place once the desired distance has been set.

Uses of Dividers

- Measuring Distances: Dividers are commonly used to measure distances on maps, blueprints, and other diagrams. The pointers are placed at the beginning and ending points of the distance and the measurement is transferred to a ruler or scale.
- Drawing Circles: By adjusting the distance between the pointers, dividers can be used to draw circles of different sizes.
- Bisecting Angles: Dividers can also be used to bisect angles by placing one pointer at the vertex of the angle and rotating the other pointer around to create two equal angles.

Conclusion

Dividers are a versatile geometrical instrument that is used in many different applications in geometry. Their ability to measure and transfer distances accurately makes them an essential tool for students, architects, engineers, and other professionals.