## 1. hypotenuse

### The hypotenuse is a term commonly used in geometry, specifically in a right triangle

The hypotenuse is a term commonly used in geometry, specifically in a right triangle. In a right triangle, which is a triangle that has one angle measuring 90 degrees, the hypotenuse is defined as the longest side. It is always the side that is directly opposite to the right angle.

The hypotenuse is important because it plays a crucial role in the Pythagorean theorem, which states that in any right triangle, the sum of the squares of the two shorter sides (also known as the legs) is equal to the square of the hypotenuse. This theorem can be written as:

a^2 + b^2 = c^2

where “a” and “b” represent the lengths of the legs and “c” represents the length of the hypotenuse.

The length of the hypotenuse can be found using the Pythagorean theorem when the lengths of the other two sides are known. Conversely, if we know the length of the hypotenuse and one of the legs, we can solve for the length of the other leg using the same theorem.

The hypotenuse is an essential concept in trigonometry as well. It is used in trigonometric ratios such as sine, cosine, and tangent, which relate the angles of a right triangle to the lengths of its sides.

In summary, the hypotenuse is the longest side of a right triangle and plays a significant role in the Pythagorean theorem and trigonometry.

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