The classifications of a triangle are:
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The question "What are the classifications of a triangle" is answered elsewhere. The angles in a triangle can be either an obtuse >90 degrees, an acute <90 degrees, or a rectal = 90 degrees
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Unilateral & Isosoles
Equalateral, Isosceles, Scalene; Acute, Obtuse, Right
Classifications by side length or comparison of angles and sides:scalene - no sides or angles equalisosceles - two sides and angles equal (congruent)equilateral - all sides and angles equal (all 60° angles)Classifications by included angles :right triangle - contains a 90° angle (right angle)oblique triangle - has no right angleacute triangle - contains all angles less than 90°obtuse triangle - contains one angle greater than 90°*Note that a triangle can be more than one type. A right triangle is a special case of either a scalene or isosceles triangle.