Three

Three is a number that follows two and precedes four. It is an integer and a prime number, and it holds significance in a variety of fields, including mathematics, science, religion, and culture.

Mathematics

In mathematics, three is the second prime number, and the only prime number to be one less than a perfect square. It is also the first odd number, and the second smallest positive integer.

Three is the first Fermat prime, and it is also the second Sophie Germain prime, the second Mersenne prime exponent, and the second factorial prime.

In geometry, a triangle is a shape with three sides, and a cube has three dimensions: length, width, and height.

Science

In science, three is the atomic number of lithium, and it is the number of natural states of matter: solid, liquid, and gas.

In biology, the genetic code of all life forms on Earth is based on sets of three nucleotides, known as codons.

Religion

In many religions, the number three holds significant symbolic value. For example, in Christianity, there is the concept of the Holy Trinity: the Father, the Son, and the Holy Spirit. In Buddhism, there are the Three Jewels: the Buddha, the Dharma, and the Sangha.

Culture

In culture, the number three is often used in expressions and sayings, such as "third time's the charm" and "three's a crowd". It is also common in story structures, with many narratives following a three-act structure.

See also

• One
• Two
• Four
• Five

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