Triangle Classification and Properties

This video tutorial teaches how to classify triangles, focusing on right triangles. It explains the different types of angles—right, acute, and obtuse—and how they relate to triangle classification. The tutorial clarifies common misunderstandings, emphasizing the need to consider both angles and sides. It covers classifying triangles by angles (acute, obtuse, right) and by sides (equilateral, isosceles, scalene). The video also explores specific types of right triangles, such as scalene and isosceles right triangles, providing a comprehensive understanding of triangle classification.

What is the measure of a right angle?

• 45 degrees

• 60 degrees

• 120 degrees

• 90 degrees

Which angle is larger than a right angle?

• Right angle

• Straight angle

• Obtuse angle

• Acute angle

What is a common mistake when classifying triangles?

• Using both angles and sides

• Using no properties

• Using only sides

• Using only angles

What type of triangle has all acute angles?

• Obtuse triangle

• Right triangle

• Acute triangle

• Scalene triangle

Which triangle has one obtuse angle?

• Right triangle

• Acute triangle

• Obtuse triangle

• Equilateral triangle

What is an equilateral triangle?

• A triangle with one right angle

• A triangle with two sides equal

• A triangle with all sides equal

• A triangle with no equal sides

Which triangle has no congruent sides?

• Isosceles triangle

• Equilateral triangle

• Scalene triangle

• Right triangle

What defines a scalene right triangle?

• One right angle and no sides equal

• One right angle and two sides equal

• No right angle and all sides equal

• One right angle and all sides equal

What is an isosceles right triangle?

• A triangle with one right angle and all sides equal

• A triangle with one right angle and two sides equal

• A triangle with no right angle and two sides equal

• A triangle with one right angle and no sides equal

What are the angles in an isosceles right triangle?

• 120, 30, 30 degrees

• 90, 60, 30 degrees

• 60, 60, 60 degrees

• 90, 45, 45 degrees