4.2 Angles of a Triangle

Question 1

Interior Angle

Answer 1

One of the three original angles in a triangle

Question 2

Exterior Angle

Answer 2

Angles that are adjacent to the interior angles of a triangle

Question 3

Triangle Sum Theorem

Answer 3

The sum of the measures of the interior angles of a triangle is 180 degrees

Question 4

Third Angles Theorem

Answer 4

If 2 angles of one triangle are congruent to 2 angles of another triangle, then the 3rd angles (in each triangle) are congruent

Question 5

The acute angles of a right triangle are…

Answer 5

Complementary

Question 6

Exterior Angles Theorem

Answer 6

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote (nonadjacent) interior angles

Question 7

Exterior Angles Inequality Theorem

Answer 7

The measure of an exterior angle of a triangle is greater than the measure of either of the two remote (nonadjacent) interior angles