It is an irregular polygon
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There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.
When each of the 3 interior angles measure less than 90 degrees and the 3 sides are of different lengths
All three sides (and therefore angles) in an equilateral triangle are the same measure. All three sides (and therefore angles) in a scalene triangle are different.
The word regular, for polygons, refers to all sides equal length, and all angles equal measure. A scalene triangle by definition, has not two sides equal, and all of the angles are different measure.
Each pair of opposite sides are of equal measure and are parallel. All the interior angles are right angles.