at right angles

The drawing, across two walls at right angles, showed a boy playing joyously in a downfall of snow – but turn the corner and the viewer sees the "snow" is actually ash falling from a fire burning in a bin, echoing the larger plumes of smoke emitted day and night at the steelworks.

On a promontory above Puget Sound, a Douglas fir with arms bent at right angles stands above a quiet cove, where shellfish would have been gathered, long before this place was settled by newcomers.

Planets that orbit stars at right angles.

But what excited them most were two pieces of wood found at right angles to each other.

"Plus we had photographs, so we could build the whole thing up. Architects are doing this all the time and there are many buildings not set at right angles, like the Crooked House."