equilateral triangle

• all sides are equal

• no sides are equal

• 2 sides are equal

all sides are equal

isosceles triangle

• all sides are equal

• no sides are equal

• 2 sides are equal

2 sides are equal

scalene triangle

• all sides are equal

• no sides are equal

• 2 sides are equal

no sides are equal

a 90 degree angle (perfect corner)

• acute

• right

• obtuse

55 degree angle

• acute

• right

• obtuse

120 degree angle

• acute

• right

• obtuse

• equilateral

• isosceles

• scalene