Owing to the violence of the surf and the perpendicular sides of the reef scarcely a vestige of the wreck remains after a few hours.

'You're looking up the perpendicular side of what that poor beggar is scrambling up the hypotenuse!'

One result of the action of the water has been the formation of numerous isolated flat-topped hills or small plateaus, known as ambas, with nearly perpendicular sides.

The perpendicular sides of the rocky canyon had drawn close together.

In one distinctive version, the minnows line up on one side of the pool, with the shark facing away from the pool on a perpendicular side.

It was really a huge, precipitous granite rock with almost perpendicular sides, but sufficiently weather-worn to make its ascent easy to little Manu.

Accordingly we now commenced it by descending the almost perpendicular side of a steep and narrow gorge, bristling with a thick growth of reeds.

Then multiply the total by the area in square inches of the slab (found by multiplying the length in inches of two perpendicular sides).

She was fascinated with the glacial valley, carved from hard, blue granite over tens of thousands of years, forming the wide, perfectly flat bottom and perpendicular sides.

Foot by foot, the black shape pursued a lizardlike course along the perpendicular side of the wall!