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| two coplanar angles that share a common vertex and a common side, but have no interior points in common |
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| the opposite angles formed by two intersecting lines |
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Definition
| two angles whose measures have a sum of 90 degrees |
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Definition
| two angles whose measures have a sum of 180 degrees |
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Definition
| a line that divides a segment into two congruent segments |
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Definition
| a segment bisector that is perpendicular to the segment that it bisects |
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Definition
| a line or ray through the vertex of an angle that divides the angle into two congruent angles |
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| a statement that you believe to be true. It is an “educated guess” based on observations. |
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Definition
| a convincing argument that uses logic to show that a statement must be true |
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Definition
| a statement that has been proven true using deductive reasoning |
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