What is an obtuse triangle

The video tutorial explains the concept of obtuse angles, particularly in the context of triangles. It highlights that an obtuse angle is greater than 90 degrees and that a triangle can only have one obtuse angle since the sum of all angles in a triangle is 180 degrees. The teacher engages a student, Josh, to reinforce the understanding of these concepts through questioning. The session concludes with a reminder for students to take notes.

What is the defining characteristic of an obtuse angle?

• It is larger than 90 degrees.

• It is exactly 90 degrees.

• It is less than 90 degrees.

• It is equal to 180 degrees.

Why can't a triangle have more than one obtuse angle?

• Because obtuse angles are equal to 180 degrees.

• Because the sum of angles in a triangle is 180 degrees.

• Because obtuse angles are less than 90 degrees.

• Because a triangle can only have right angles.

If a triangle has an obtuse angle of 100 degrees, what is the maximum possible measure for another angle in the same triangle?

• 79 degrees

• 90 degrees

• 80 degrees

• 89 degrees

What is the total sum of all angles in any triangle?

• 180 degrees

• 90 degrees

• 360 degrees

• 270 degrees

What do we call a triangle that contains one obtuse angle?

• Right triangle

• Obtuse triangle

• Equilateral triangle

• Acute triangle