Example sentences of "are at right [noun] " in BNC.

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1 If e = √2 the asymptotes are at right angles and the curve is called a rectangular hyperbola .
2 The axes of an ellipse are at right angles .
3 The cleavage planes are at right angles to one another .
4 When the snake 's mouth is shut they lie flat , but when the jaws are opened wide to strike , the two upper teeth that supply the venom are pivoted down through about go degrees , so that they are at right angles to the top of the head .
5 The balance mechanism consists of three semi-circular canals , or small loops which are at right angles to each other , a convenient arrangement covering three dimensions .
6 Lie flat , bend the knees then straighten the legs upwards so that they are at right angles to your body .
7 When the sun and moon are at right angles to the Earth , as at each half moon , their pulls counteract each other , producing the weak neap tides .
8 True straight grain occurs when the weft ( crosswise ) and warp ( lengthwise ) threads are at right angles to each other .
9 Except in the southeast corner , the properties in this unit are at right angles to the north-south road , and the overall rectilinear arrangement of the plan is clear .
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