Classify Triangles by Angle Type

This video tutorial teaches how to classify triangles based on their angles. It begins with a review of angles and their types, then explains how triangles can be categorized as right, acute, or obtuse based on their angles. The video provides real-world examples of each triangle type, such as bridges for right triangles, chips for acute triangles, and pyramids for obtuse triangles. It also includes exercises for sorting triangles into these categories and concludes with a summary of the classification process.

What is a triangle defined as?

• A polygon with four sides and four angles

• A polygon with three sides and three angles

• A shape with two sides and two angles

• A figure with no sides or angles

Which type of triangle has one right angle?

• Equilateral triangle

• Acute triangle

• Obtuse triangle

• Right triangle

What type of triangle has all acute angles?

• Right triangle

• Acute triangle

• Isosceles triangle

• Obtuse triangle

In which category would a triangle with one obtuse angle fall?

• Acute triangle

• Scalene triangle

• Right triangle

• Obtuse triangle

What type of triangle is formed on the inside of stairs?

• Acute triangle

• Right triangle

• Obtuse triangle

• Equilateral triangle