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.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is an angle?
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A figure formed by two rays sharing a common endpoint- What is the vertex of an angle?
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The common endpoint of the two rays forming the angle- What is an acute angle?
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An angle measuring less than 90 degrees- What is a right angle?
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An angle measuring exactly 90 degrees- What is an obtuse angle?
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An angle measuring more than 90 but less than 180 degrees- What is a straight angle?
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An angle measuring exactly 180 degrees- What are complementary angles?
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Two angles whose measures add up to 90 degrees- What are supplementary angles?
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Two angles whose measures add up to 180 degrees- What are vertical angles?
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A pair of opposite angles formed by two intersecting lines, always congruent- What are adjacent angles?
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Two angles that share a vertex and a side, but do not overlap- What is a linear pair of angles?
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Two adjacent angles that together form a straight line- What are parallel lines?
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Lines in the same plane that never intersect- What symbol represents parallel lines?
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||- What is a transversal?
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A line that crosses two or more other lines- What are corresponding angles, formed by a transversal crossing parallel lines?
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Angles in the same relative position at each intersection, which are congruent
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