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Geometry-Characteris
SSC Math 8 Geometry-Characteristics
Term | Definition |
---|---|
Triangle Sum Theorem | The theorem that states that the measures of the angles in a triangle add up to 180 degrees |
Parallel lines | Lines in a plane that do not intersect |
Transversal | a line that intersects two or more lines |
Corresponding Angles | For two lines intersected by a transversal, a pair of angles that lie on the same side of the transversal and on the same sides of the other two lines. |
Alternate Interior Angles | For two lines intersected by a transversal, a pair of nonadjacent angles that lie on opposite sides of the transversal and between the other two lines |
Alternate Exterior Angles | For two lines intersected by a transversal, a pair of angles that lie on opposite sides of the transversal and outside the other two lines |
Vertical Angles | A pair of opposite congruent angles formed by intersecting lines |
Supplementary Angles | Two angles whose measures have a sum of 180 degrees |
Complementary Angles | Two angles whose measures have a sum of 90 degrees |
Acute Angle | An angle that measures greater than 0 degrees and less than 90 degrees |
Obtuse Angle | An angle whose measure is greater than 90 degrees but less than 180 degrees |
Right Angle | An angle that measures 90 degrees |
Straight Angle | An angle that measures 180 degrees |
Adjacent Angles | Angles in the same plane that have a common vertex and a common side |
Angle | A figure formed by two rays with a common endpoint called the vertex |
Congruent Angles | Angles that have the same measure |
Perpendicular Lines | Lines that intersect to form right angles |