Exterior Angles of Triangles

What is the definition of an exterior angle of a triangle?

• An exterior angle of a triangle is an angle formed by two sides of the triangle.

• An exterior angle of a triangle is an angle formed by the intersection of two sides of the triangle.

• An exterior angle of a triangle is an angle formed by one side of the triangle and the extension of another side.

• An exterior angle of a triangle is an angle formed by the sum of the interior angles of the triangle.

True or False: Exterior angles of a triangle are always greater than the corresponding interior angles.

• Sometimes true, sometimes false

• False

• Exterior angles do not exist in a triangle

• True

What is the sum of all exterior angles of a triangle?

• 180

• 360

• 270

• 90

If Titi and Dian are two exterior angles of a triangle and their measures are 40 degrees and 60 degrees respectively, what is the measure of the third exterior angle?

• 260

• 180

• 100

• 220

True or False: The measure of an exterior angle of a triangle is equal to the sum of the measures of the two interior angles adjacent to it.

• True

• True and False

• The measure of an exterior angle of a triangle is always 180 degrees

• False

If Hadi, Dian, and Laila are measuring the exterior angle of a triangle and they find it to be 120 degrees, what is the measure of the corresponding interior angle?

• 90

• 60

• 120

• 30

What is the relationship between the measure of an exterior angle and the measures of the two non-adjacent interior angles of a triangle?

• The measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

• The measure of an exterior angle is equal to the average of the measures of the two non-adjacent interior angles.

• The measure of an exterior angle is equal to the product of the measures of the two non-adjacent interior angles.

• The measure of an exterior angle is equal to the difference of the measures of the two non-adjacent interior angles.

If the measure of an exterior angle of a triangle is 90 degrees, what is the measure of the corresponding interior angle?

• 30

• 60

• 45

• 75

True or False: The sum of the measures of the three exterior angles of a triangle is always 360 degrees.

• 90 degrees

• False

• 180 degrees

• True

If Rina's exterior angle of a triangle is 150 degrees, what is the measure of the two non-adjacent interior angles?

• 60

• 105

• 45

• 30