Classifying triangles - Boggess
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This document defines and provides examples of six types of triangles: scalene triangles which have no equal sides; isosceles triangles which have two equal sides; equilateral triangles which have three equal sides; right triangles which have one 90 degree angle; obtuse triangles which have one angle greater than 90 degrees; and acute triangles where all angles are less than 90 degrees.
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Classifying triangles - Boggess
- 2. Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.
- 3. Isosceles triangle: An isosceles triangle is a triangle that has two equal sides. The following is an isosceles triangle.
- 4. Equilateral triangle: An equilateral triangle is a triangle that has three equal sides. The following is an equilateral triangle.
- 5. Right triangle: A right triangle has a 90 degrees angle.The following is a right triangle.
- 6. Obtuse triangle: An obtuse triangle has one angle that is bigger than 90 degrees (Obtuse angle). The following is an obtuse triangle.
- 7. Acute triangle: In an acute triangle, all angle are less than 90 degrees, so all angles are acute angles.The following is an acute triangle.