![]() In the equilateral triangle above, sides a = b = c and angles A = B = C. The figure below shows an example of an equilateral triangle. All equilateral triangles are acute triangles because their interior angles will always be less than 90° by definition. Since the interior angles of a triangle sum to 180°, the interior angles of an equilateral triangle are all equal to 60°. Equilateral triangleĪn equilateral triangle is an acute triangle whose sides are all equal and whose interior angles all have the same measure. ![]() Types of trianglesĪn acute triangle can be categorized as an equilateral triangle, isosceles acute triangle, or a scalene acute triangle. An acute triangle can be equilateral, isosceles, or scalene. Since all of the interior angles are 60°, the acute triangle above is more specifically described as an equilateral triangle. An example of an acute triangle in real life is a yield sign: ![]() Acute triangle definitionĪn acute triangle is a 3-sided polygon in which the interior angles (the angles formed inside the triangle) all measure less than 90°. Generally, triangles are categorized into 6 types: acute, obtuse, right, equilateral, isosceles, and scalene. What is an acute triangleĪn acute triangle is characterized by having no angles that measure larger than 90°. Home / geometry / triangle / acute triangle Acute triangleĪn acute triangle is a type of triangle in which the three internal angles have measures of less than 90°. ![]()
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