## Triangle

### a three-sided polygon

A triangle is a polygon that has three sides, three vertices, and three angles. It is the simplest polygon that can be made with straight lines, and it is also the most commonly studied polygon in mathematics.

There are many types of triangles, but the most common classification is based on the length of their sides and the measure of their angles. Here are some examples:

– Equilateral triangle: A triangle with all three sides of equal length and all three angles of equal measure (60 degrees).

– Isosceles triangle: A triangle with two sides of equal length and two angles of equal measure.

– Scalene triangle: A triangle with all three sides of different lengths and all three angles of different measures.

– Acute triangle: A triangle with all three angles less than 90 degrees.

– Right triangle: A triangle with one angle equal to 90 degrees.

– Obtuse triangle: A triangle with one angle greater than 90 degrees.

Triangles have many interesting properties and formulas that are useful in various fields such as geometry, physics, engineering, and computer graphics. Some of these properties include the Pythagorean theorem, the law of sines and cosines, the centroid, the circumcenter, and the area formula.

##### More Answers:

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Master The Trigonometric Function Of Tangent And Its Applications | Beginner’S Guide.