A triangle whose interior angles are all less than 90 degrees.
A triangle that contains an obtuse interior angle that is more than 90 degrees and less than 179 degrees.
A triangle with a right angle that is 90 degrees.
Isosceles Triangle is a triangle with two equal sides.
A Scalene Triangle is a triangle that has no equal sides.
Equilateral Triangle is a three-sided shape with all sides and all angles equal.