Elementary geometry is a branch of mathematics that deals with the properties and relationships of basic geometric figures such as points, lines, angles, triangles, circles, and polygons. It lays the foundation for more advanced geometrical concepts and is typically one of the first areas of geometry studied in school. Key concepts in elementary geometry include: 1. **Points and Lines**: The fundamental building blocks of geometry.

"Ombak tujuh," which translates to "seven waves" in English, is a traditional concept found in Indonesian culture, particularly associated with the island of Bali. It typically refers to a specific natural phenomenon where a series of seven waves occur in succession. In Balinese culture, these waves are often linked to various aspects of spirituality and rituals. For example, they may play a role in ceremonial practices or signify important moments in life.

Anamorphosis is a distorted projection or perspective that requires the viewer to occupy a specific vantage point, use a particular mirror, or engage with the artwork in a certain way to perceive the intended image or form. The term is often used in the context of visual arts, particularly in painting and drawing, but it can also apply to other forms of representation, such as sculpture.

Two parallel Josephson junctions.

In Ciro's ASCII art circuit diagram notation:

Almost always too short superficial where it matters unfortunately, as usual.

Cosmogony is the study of the origin and development of the universe, particularly the processes that lead to the creation of celestial bodies and the cosmos as a whole. It encompasses various philosophical, religious, and scientific explanations of how the universe came into being. In mythology and religion, cosmogonies often include narratives that describe the creation of the world by deities or cosmic forces.

Arithmeum is a mathematical museum located in Bonn, Germany. It emphasizes the history and development of mathematics, particularly arithmetic. The museum features a variety of exhibits, including historical artifacts, mathematical models, and interactive displays that illustrate mathematical concepts and the evolution of mathematical thought. One of the key attractions of the Arithmeum is its extensive collection of calculating devices, from ancient tools to modern machines. Visitors can explore the significance of mathematics in everyday life, science, and technology.