Chapter 1 - Section 3 Special Angles. Supplementary Angles Two or more angles whose sum of their measures is 180 degrees. These angles are also known.

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Presentation transcript:

Chapter 1 - Section 3 Special Angles

Supplementary Angles Two or more angles whose sum of their measures is 180 degrees. These angles are also known as linear pairs. The difference: Supplementary angles do not have to share a side, linear pairs do.

Complementary Angles Two or more angles whose sum of their measures is 90 degrees.

Adjacent Angles Angles that are next to each other and share a side.

Vertical Angles Angles that are across from each other. Formed by intersecting lines. Vertical angles are congruent.

Midpoint of a Segment The middle point of a segment. It divides the segment into two equal parts. Midpoint

Perpendicular Two lines or segments that intersect to form a 90 degree angle.

Perpendicular Bisector A line, segment, or ray that intersects a segment at its midpoint and forms a 90 degree angle. Perpendicular bisector