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