Term
| Two planes are perpendicular if and only if |
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Definition
| One plane contains a line perpendicular to the others. |
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Term
| If a line is perpendicular to each of two intersecting lines at their point of intersection |
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Definition
| Then the line is perpendicular to the plane determined by these lines. |
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Term
| Through a given point on a plane |
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Definition
| There is only one line perpendicular to the given plane |
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Term
| Through a given point on a line |
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Definition
| there can be only one plane perpendicular to the given line. |
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Term
| If a line is perpendicular to a plane |
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Definition
| Then any line perpendicular to the given line at its point of intersection with the given plane is in the plane. |
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Term
| If a line is perpendicular to a plane |
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Definition
| then every plane containing the line is perpendicular to the given plane |
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Term
| If a plane intersects two parallel planes |
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Definition
| Then the intesection is two parallel lines |
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Term
| Two lines perpendicular to the same plane |
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Definition
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Term
| If two planes are perpendicular to the same line |
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Definition
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