What terms describe a triangle?

A triangle is typically described by its sides and angles. The sides can be classified as equilateral (all sides equal), isosceles (two sides equal), or scalene (all sides different). Angles can be categorized as acute (all angles less than 90°), right (one angle equal to 90°), or obtuse (one angle greater than 90°). Additionally, triangles can be categorized based on their orientation, such as acute-angled, obtuse-angled, or right-angled triangles.