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40 Cards in this Set
- Front
- Back
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Collinear Points |
Points on the same line |
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Coplanar Points |
Points on the same plane |
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Point |
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Line |
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Plane |
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Counterexample |
an example that shows a conjecture is false |
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Conjecture |
An unproven statement |
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Line Segment |
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Linear |
A LINE |
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Endpoints |
(A and B) |
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Ray |
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Initial Point |
(P) |
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Opposite Rays |
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Intersect |
To have one or more points in common; this is called the intersection |
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Intersection |
(Point E is the intersection)
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Coordinate |
The number that corresponds to the point |
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Distance Formula |
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Length |
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Congruent Segments |
Segments that have the same length |
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Angle |
*Two rays |
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Vertex |
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Sides |
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Congruent Angles |
Angles with the same measure |
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Measure of an angle |
The absolute value of the difference between the real numbers for the sides of an angle (USE PROTRACTOR) |
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Interior and Exterior of an Angle |
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Adjacent Angles |
Angles that share a common vertex and side but have no interior points in common |
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Acute |
Less than 90 degrees |
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Obtuse |
Over 90 degrees |
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Right |
90 degrees |
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Straight |
180 degrees |
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Midpoint Formula |
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Bisects |
Divides at the midpoint; cuts in half |
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Segment Bisector |
Can be a segment, line, or ray |
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Angle Bisector |
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Vertical Angles |
Across from each other; Same in measure |
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Linear Pair |
Along the same line; Supplementary |
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Complementary Angles |
Sum of measures is 90 degrees |
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Complement |
The other angle that gets you to 90 degrees |
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Supplementary Angles |
Sum of measures is 180 degrees |
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Supplement |
The other angle that gets you to 180 degrees |
