Triangles and Angle Relationships

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees

Front

If angle 2 is 70 degrees, what is the measure of angle 1 if they are supplementary?

Back

110 degrees

Front

What is a Vertical Angle?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

What are Alternate Interior Angles?

Back

Angles that lie between two parallel lines and on opposite sides of a transversal; they are equal.

Front

What are Corresponding Angles?

Back

Angles that are in the same position on two parallel lines in relation to a transversal; they are equal.

Front

What is a Remote Interior Angle?

Back

An interior angle of a triangle that is not adjacent to a given exterior angle.

Front

What is the definition of an Exterior Angle?

Back

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

Front

If angle d is an exterior angle, what are its Remote Interior Angles?

Back

The two interior angles that are not adjacent to angle d.

Front

What is the relationship between an Exterior Angle and its Remote Interior Angles?

Back

The exterior angle is equal to the sum of its remote interior angles.

Front

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

Back

60 degrees.