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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a chattering or flighty, light-headed person. |
| alternate angles | |
| —pl n | |
| two angles at opposite ends and on opposite sides of a transversal cutting two lines | |
| alternate angles
Two angles formed on opposite sides of a line that crosses two other lines. The angles are both exterior or both interior, but not adjacent. |