Learn how to classify a triangle based on the number of sides ex 1

The video tutorial explains how to classify triangles based on their angles. It begins by discussing the characteristics of right and obtuse triangles, noting the absence of a right angle or an obtuse angle in the example. The focus then shifts to acute triangles, emphasizing that all angles must be acute. Finally, it concludes with the identification of an equiangular triangle, where all three angles are equal and acute.

What is the defining feature of a right triangle?

• All angles are equal

• It has a 90-degree angle

• All angles are less than 90 degrees

• One angle is greater than 90 degrees

Which of the following is true about an obtuse triangle?

• All angles are equal

• It has a 90-degree angle

• One angle is greater than 90 degrees

• All angles are less than 90 degrees

For a triangle to be classified as acute, what must be true?

• All angles are equal

• One angle is greater than 90 degrees

• All angles are less than 90 degrees

• It has a 90-degree angle

What is a characteristic of an equiangular triangle?

• One angle is greater than 90 degrees

• It has a 90-degree angle

• All angles are equal

• All angles are less than 90 degrees

If a triangle has three equal angles, what type of triangle is it?

• Equiangular triangle

• Right triangle

• Obtuse triangle

• Acute triangle