The video tutorial explains how to classify triangles based on their angles. It covers different types of triangles, including acute, obtuse, right, and equal angular triangles. An equal angular triangle has all angles equal, while a right triangle includes a right angle. An obtuse triangle has one angle greater than 90 degrees, and an acute triangle has all angles less than 90 degrees. The tutorial concludes by identifying the given triangle as acute.

Which of the following is NOT a type of triangle based on angles?

• Right

• Scalene

• Obtuse

• Acute

What is a key characteristic of an equiangular triangle?

• All angles are equal.

• It has one right angle.

• All sides are different.

• It has one obtuse angle.

For a triangle to be classified as a right triangle, what must it include?

• All angles less than 90 degrees

• At least one angle greater than 90 degrees

• At least one right angle

• All angles equal

What is a defining feature of an obtuse triangle?

• It has one right angle

• All angles are less than 90 degrees

• It has one angle greater than 90 degrees

• All angles are equal

Which type of triangle has all three angles less than 90 degrees?

• Obtuse triangle

• Equiangular triangle

• Right triangle

• Acute triangle