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Cards In This Set
| Front | Back |
 A line that goes on infinitely in one direction. |
Ray
|
 A figure formed by two rays that began at a common point called the vertex |
Angle
|
 Two lines that intersect to form a right angle. |
Perpendicular lines
|
 Two lines that are in the same plane that do not intersect. |
Parallel Lines
|
 Two or more angles that have a sum of 90° |
Complementary Angles
|
 Two or more angles that have a sum of 180° |
Supplementary Angles
|
 Two angles formed when two lines meet at a point and DO NOT share a side |
Vertical Angles
|
 An angle whose measure is less than 90° |
Acute Angle
|
 An angle whose measure is greater than 90° but less than 180° |
Obtuse Angle
|
 An angle whose measure is exactly 180° |
Straight Angle
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