The video tutorial explains how to classify triangles based on their angles and side lengths. Triangles can be categorized into right, obtuse, and acute based on angles, and into equilateral, isosceles, and scalene based on side lengths. Equilateral triangles have all sides and angles equal, isosceles triangles have two equal sides and angles, and scalene triangles have no equal sides or angles. The tutorial also discusses combining these classifications, such as right isosceles triangles.

How can triangles be classified based on their angles?

• Right, obtuse, and acute

• Equilateral, isosceles, and scalene

• Large, medium, and small

• Parallel, perpendicular, and intersecting

What is a characteristic of an equilateral triangle?

• Two sides are equal in length

• It has a right angle

• All sides are different lengths

• All sides and angles are equal

Which type of triangle has two sides of equal length?

• Isosceles

• Right

• Equilateral

• Scalene

What defines a scalene triangle?

• No sides or angles are equal

• All sides are equal

• Two sides are equal

• It has a right angle

What is a right isosceles triangle?

• A triangle with no equal sides and a right angle

• A triangle with all sides equal and a right angle

• A triangle with all angles equal

• A triangle with two equal sides and a right angle