Triangle Classification and Properties

The video tutorial explains how to classify triangles based on their angles. It introduces four types of triangles: obtuse, acute, right, and equiangular. The obtuse triangle has an angle greater than 90 degrees, the acute triangle has all angles less than 90 degrees, the right triangle has one angle of exactly 90 degrees, and the equiangular triangle has all angles equal. The tutorial provides examples to illustrate how to classify triangles by examining their angles.

What is the primary focus when classifying triangles in this tutorial?

• The area of the triangle

• The angles of the triangle

• The length of the sides

• The color of the triangle

Which type of triangle has one angle greater than 90 degrees?

• Obtuse triangle

• Equiangular triangle

• Acute triangle

• Right triangle

In an acute triangle, what is true about all the angles?

• One angle is exactly 90 degrees

• They are all less than 90 degrees

• They are all greater than 90 degrees

• All angles are equal

What is a defining feature of a right triangle?

• One angle is greater than 90 degrees

• All angles are less than 90 degrees

• One angle is exactly 90 degrees

• All angles are equal

What is true about the angles in an equiangular triangle?

• One angle is greater than 90 degrees

• All angles are equal

• One angle is exactly 90 degrees

• All angles are different

In the example, which triangle is identified as a right triangle?

• Triangle ACD

• Triangle ABC

• Triangle ABD

• Triangle ACB

What is the measure of each angle in triangle ACB?

• 60 degrees

• 45 degrees

• 30 degrees

• 90 degrees

Which triangle is classified as equiangular in the example?

• Triangle ACD

• Triangle ABC

• Triangle ABD

• Triangle ACB

What is the measure of angle ACD in the example?

• 120 degrees

• 90 degrees

• 60 degrees

• 30 degrees

Which triangle is identified as obtuse in the example?

• Triangle ACD

• Triangle ABD

• Triangle ACB

• Triangle ABC