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21 Cards in this Set
- Front
- Back
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Acute Angle |
an angle whose measure is less than 90 degrees but more than 0 |
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Angle |
a figure formed by two rays with a common endpoint
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Angle Bisector
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a line or ray that divides an angle into two congruent angles |
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Complementary Angles
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two angles whose measures have a sum of 90 degrees
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Conjecture
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a statement that you think is true- an "educated guess" |
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Endpoints
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the location where a line/ray begins/ends |
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Line
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has no thickness, is perfectly straight and extends forever
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Line Segment
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part of a line that begins at one point and ends at the other |
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Linear Pair
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if two angles form this, they are supplementary |
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Midpoint of a Segment
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the point where a bisector intersects a segment |
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Obtuse Angle
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an angle whose measure is greater than 90 degrees and less than 180 degrees
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Perpendicular Lines
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two lines that intersect to form a right angle |
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Plane
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geometric figure that extends infinitely in all directions along a flat surface
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Point
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often shown as dots, represent location and have no size
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Postulate
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statements that are accepted as true without proof
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Pre-image
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a shape that undergoes a motion or transformation |
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Ray
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a part of a line that starts at one point and extends infinitely in one direction
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Right Angle
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an angle whose measure is 90 degrees |
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Segment Bisector
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a line that divides a segment into two congruent parts |
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Supplementary Angles
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two angles whose measures have a sum of 180 degrees |
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Undefined Terms |
the building blocks of geometry - lines, planes and points |
