Lines, Line Segment, Ray, Angles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Line Segment | measurable piece of a line with 2 distinct endpoints
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| Distance Formula | the distance between two points A (x1,y1) and B (x2, y2)
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| Congruent | having the same size AND the same shape
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| Congruent Segments | If segments are congruent, they are also equal
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| Bisect | to cut in half. A midpoint bisects a segment and gives 2 congruent parts
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| Midpoint Formula | xm= x1 + x2/2 and y1 + y2/2. This gives the midpoint values when you are given two other points on a line segment
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| Ray | a part of a line with exactly one endpoint. It goes indefinitely long in one direction. Remember in naming a ray that order matters!!
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| Angle | 2 rays with a common end point.
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| Naming a Ray | Always start with the endpoint!!
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| Naming an Angle | Always put the vertex in the middle of the angle name
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| Right Angle | an angle which has a measure of 90 degrees
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| acute angle | an angle which has a measure less than 90 degrees
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| obtuse angle | an angle which has a measure more than 90 degrees
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| straight angle | an angle which has a measure of 180 degrees
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| angle bisector | a ray that divides an angle
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| Adjacent Angles | adjacent angles are next to each other and share a ray.
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| Vertical Angles | two non adjacent angles formed by 2 intersecting lines
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| Complementary Angles | their measure add to be 90 degrees
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| Supplementary Angles | their measure add to a total of 180 degrees
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| Perpendicular | to prove something is perpendicular, you need to prove that it is 90 degrees.
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| Adjacent Supplementary Angles | same as a linear pair.
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Created by:
amgeometry
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