Geometry, Unit 2: Angles and Parallel Lines. Key terms, formulas, and worked-example cues a high school student meets for this unit, building on prior units. Front: the term, formula name, or short problem cue. Back: the definition, formula, or solution method.
30 cards · basic cards · AI-written, checked twice. Edit anything.
- What is an angle?
- A figure formed by two rays sharing a common endpoint
- What is the vertex of an angle?
- The common endpoint of the two rays forming the angle
- What is an acute angle?
- An angle measuring less than 90 degrees
- What is a right angle?
- An angle measuring exactly 90 degrees
- What is an obtuse angle?
- An angle measuring more than 90 but less than 180 degrees
- What is a straight angle?
- An angle measuring exactly 180 degrees
- What are complementary angles?
- Two angles whose measures add up to 90 degrees
- What are supplementary angles?
- Two angles whose measures add up to 180 degrees
- What are vertical angles?
- A pair of opposite angles formed by two intersecting lines, always congruent
- What are adjacent angles?
- Two angles that share a vertex and a side, but do not overlap
- What is a linear pair of angles?
- Two adjacent angles that together form a straight line
- What are parallel lines?
- Lines in the same plane that never intersect
- What symbol represents parallel lines?
- ||
- What is a transversal?
- A line that crosses two or more other lines
- What are corresponding angles, formed by a transversal crossing parallel lines?
- Angles in the same relative position at each intersection, which are congruent
FlashKeepers