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24 Cards in this Set
- Front
- Back
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Perpendicular lines
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Two intersecting lines with opposite slopes that cross at 90 degrees
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Parrallel lines
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Two lines with the same slope but different Y-Intercepts
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Horizontal Lines
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Lines parrallel to the x-axis
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intersecting lines
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when two rays intersect one another
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angle
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where two rays share the same endpoint
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acute angle
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when two rays meet at an angle between 0 - 90 degrees
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obtuse angle
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when two rays meet at an angle between 90 and 180 degrees
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right angle
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when two rays meet at an angle that is exactly 90 degrees
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straight angle
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an angle of 180 degrees
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degrees
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the measure of the vertex of an angle
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protractor
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a device used to measure the degrees of an angle
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ray
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a straight line with two endpoints
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vertex of an angle
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where the two rays meet
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sides of an angle
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the two rays that form the angle
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adjacent angles
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two angles that have the same vertex and a side in common
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congruent
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to be equal
for example: when two lines are congruent, they have the same length |
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interior point
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a point randomly placed on a ray
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transversal
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a line intersecting 2 or more lines
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complementary angles
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when two angles' degrees add up to between 0 and 90 degrees
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supplementary
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when two angles' degrees add up to between 90 and 180 degrees
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vertical angles
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Two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.
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corresponding angles
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two parrallel lines that are both intersected by another line with a different slope
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alternate interior angles
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the angles on the interior of a corresponding angle
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alternate exterior angles
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the angles on the exterior of a corresponding angle
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