It has 3 angles less than 90°
Equilateral triangle
It has 3 angles, 3 sides, and 3 vertices
It has one angle bigger than 90° but less than 180°
It has one angle of 90°
Obtuse triangle
It has 3 different sides
Isosceles triangle
Triangle
It has 3 congruent sides
Scalene triangle
It has 2 congruent sides and 1 angle of 90°
Isosceles rigth triangle
Acute triangle
It has 2 congruent sides
Right triangle
