triangle
A polygon with three sides.
A triangle is a 3-sided polygon that has three vertices (corners) and three sides connecting these vertices. The sum of the interior angles of a triangle is always 180 degrees. There are different types of triangles, based on the measures of their sides and angles.
1. Scalene Triangle: This type of triangle has all three sides of different lengths.
2. Isosceles Triangle: An isosceles triangle has two equal sides and two equal angles opposite to those sides.
3. Equilateral Triangle: A triangle in which all three sides are of equal length.
4. Right Triangle: This type of triangle has one right angle (90°) and two acute angles.
5. Acute Triangle: All three angles of this type of triangle are acute angles (less than 90°).
6. Obtuse Triangle: This type of triangle has one angle that is an obtuse angle (greater than 90°) and two acute angles.
In geometry, triangles have a lot of properties and formulas that are used to calculate their sides, angles, and areas. The most famous formula for the area of a triangle is A = (1/2)bh, where A is the area of the triangle, b is the length of its base, and h is the altitude or height of the triangle.
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