Semicircle (noun)

A shape that represents half of a circle, often described by its radius and center.

Origin:

Late 16th century: from semi- + circle.

Examples:

1. The semicircle was a common design element in ancient art and architecture, often symbolizing balance and harmony.
2. The semicircle was used to define the space for various activities, such as sports or performances, in public areas.
3. The semicircle was a useful tool for geometry and trigonometry, as it allowed for easy calculation of angles, arcs, and lengths.
4. The semicircle was a popular subject in mathematics and science, as it revealed many interesting properties and relationships.
5. The semicircle was a fundamental shape in nature, as it was observed in various phenomena, such as the shape of the moon, the rainbow, and the waves.