Understanding Exterior Angles of a Triangle

The video tutorial from MooMooMath explains the concept of exterior angles in triangles. It begins by defining interior and exterior angles, then demonstrates how to create an exterior angle by extending a side of a triangle. The tutorial explains that the exterior angle is supplementary to the interior angle, using a 45-degree angle as an example. It also covers the rule that the sum of the interior and exterior angles on a straight line is 180 degrees. The video concludes with another example, showing how to calculate an exterior angle when the interior angle is 30 degrees.

What is the term for the angles located inside a triangle?

• Exterior angles

• Linear pairs

• Interior angles

• Supplementary angles

How do you create an exterior angle in a triangle?

• By bisecting an interior angle

• By extending one side of the triangle

• By adding all interior angles

• By drawing a perpendicular line from a vertex

What is the sum of an exterior angle and its adjacent interior angle?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

If an interior angle of a triangle is 30 degrees, what is the measure of its exterior angle?

• 150 degrees

• 60 degrees

• 30 degrees

• 120 degrees

Which of the following statements is true about exterior angles?

• They are always equal to the interior angles.

• They are always less than 90 degrees.

• They are equal to the sum of all interior angles.

• They are supplementary to the interior angles.