Learn to classify triangles by their angles and sides. Master the six main triangle types and understand their unique properties and real-world applications.
All angles are less than 90°
Example:
60°, 70°, 50°
Properties:
One angle equals exactly 90°
Example:
90°, 60°, 30°
Properties:
One angle is greater than 90°
Example:
120°, 40°, 20°
Properties:
All sides have different lengths
Example:
Sides: 3, 5, 7
Properties:
Two sides have equal lengths
Example:
Sides: 5, 5, 8
Properties:
All three sides are equal
Example:
Sides: 6, 6, 6
Properties:
Use our calculators to practice triangle classification and understand properties.