Question

Triangles can be classified on the basis of :

• A. the types of angles
• B. length of line segments
• C. sum of all the angles
• D. sum of the exterior angles

Answer 1

Answer: (A), (B)

The correct options are
A the types of angles
B length of line segments

The basic elements of any triangle are its sides and angles. Triangles are classified depending on relative sizes of their elements, i.e.,sides and angles.

As regard their sides, triangles may be

• Scalene (all sides are different)
• Isosceles (two sides are equal)
• Equilateral (all three sides are equal)

And as regard their angles, triangles may be

• Acute (all angles are acute)
• Right (one angle is right)
• Obtuse (one angle is obtuse)
• Equiangular (all angles are equal)