GW: Exterior Angle Theorem Flashcard

Front

What is the Exterior Angle Theorem?

Back

The Exterior Angle Theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.

Front

Define remote interior angles in relation to a triangle.

Back

Remote interior angles are the two angles inside a triangle that are not adjacent to a given exterior angle.

Front

What is an exterior angle?

Back

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

Front

If one exterior angle of a triangle measures 120°, what is the sum of the remote interior angles?

Back

The sum of the remote interior angles is 120°.

Front

Solve for x: 4x - 2 + 75 = 12x + 1.

Back

x = 6.

Front

What is the relationship between an exterior angle and its adjacent interior angle?

Back

The exterior angle is equal to the sum of the two remote interior angles, not the adjacent interior angle.

Front

Identify the term: Angle formed outside a triangle by extending one of its sides.

Back

Exterior angle.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

If angle A = 50° and angle B = 60°, what is the measure of the exterior angle at C?

Back

The exterior angle at C is 110°.

Front

Choose the correct equation to find x: 4x - 2 + 12x + 1 = 75.

Back

This equation can be simplified to find x.