ANGLE SUM RELATION IN A TRIANGLE.

Front

What is the angle sum property of a triangle?

Back

The angle sum property states that the sum of the interior angles of a triangle is always 180 degrees.

Front

If one angle of a triangle measures 60 degrees and another measures 80 degrees, what is the measure of the third angle?

Back

The third angle measures 40 degrees (180 - 60 - 80 = 40).

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

How do you find the measure of an angle when given the measures of the other two angles in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the definition of a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

If angle 4 is 50 degrees, what is the measure of angle 5 if they are alternate interior angles?

Back

Angle 5 also measures 50 degrees.

Front

What is the exterior angle theorem?

Back

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

Front

How do you solve for x in an equation involving angles?

Back

Isolate x by using algebraic operations to rearrange the equation.