Perpendicular and Angle Bisectors

Front

What is an angle bisector?

Back

A ray that divides an angle into two congruent angles.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

What is the definition of a median in a triangle?

Back

A line segment joining a vertex to the midpoint of the opposite side.

Front

What is the relationship between the angles formed by perpendicular lines?

Back

They form four right angles.

Front

If two angles are complementary, what is the sum of their measures?

Back

90 degrees.

Front

What is the definition of an altitude in a triangle?

Back

A perpendicular segment from a vertex to the line containing the opposite side.

Front

How do you prove triangles are congruent using ASA?

Back

You need two angles and the included side to be equal.

Front

What is the formula for finding the length of a segment in a right triangle?

Back

Pythagorean theorem: a² + b² = c².

Front

What is the definition of a perpendicular bisector?

Back

A line that divides a segment into two equal parts at a right angle.

Front

If m∠A + m∠B = 90°, what can we say about angles A and B?

Back

They are complementary angles.