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 Triangle Facts for Kids Enjoy a range of interesting triangle facts for kids and have fun learning about the 3-sided polygon. Find information related to equilateral triangles, isosceles triangles, scalene triangles, obtuse triangles, acute triangles, right angle triangles, the hypotenuse, angles of a triangle and more. Improve your geometry knowledge with our interesting triangle facts and trivia.

 Triangles are polygons with the least possible number of sides (three). The three internal angles of a triangle always add to 180 degrees. An equilateral triangle has three sides of equal length and three equal angles. An isosceles triangle has two sides of equal length and two equal angles. A scalene triangle has no sides of equal length and no equal angles. A right angle triangle has one angle that is 90 degrees. An obtuse triangle has one angle larger than 90 degrees. An acute triangle has angles that are all less than 90 degrees. The longest side of a right angle triangle is called the hypotenuse, it is always found opposite the right angle. Trigonometry is the study of the relationship between the angles of triangles and their sides. Triangle shapes are often used in construction because of their great strength. Now that you're an expert on triangles, try learning about squares, quadrilaterals and other 2D polygon shapes. Equilateral triangle Isosceles triangle Scalene triangle Right angle triangle Obtuse triangle Acute triangle

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