What are the definitions and classifications of triangles based on their angles?

Here are the solutions to the triangle problems. Question 11. Define the term triangle. Definition: A triangle is a polygon with three straight sides and three vertices (corners). The sum of its three interior angles always equals 180^. Question 12. Classify the following triangles with angles. a) 60^, 60^, 60^ All three angles are equal. Classification: Equilateral triangle* (and also equiangular). b) 70^, 40^, 70^ Two angles are equal ($70