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You will then have one side and the corner fixed, and the problem is to get another line at right angles to it. Boys who have studied geometry know that "in a right-angle triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides." It isn't necessary to understand this, but it is the principle employed in "squaring."
One of the reasons why I felt the electric railway to be eminently practical was that Henry Villard, the President of the Northern Pacific, said that one of the greatest things that could be done would be to build right-angle feeders into the wheat-fields of Dakota and bring in the wheat to the main lines, as the farmers then had to draw it from forty to eighty miles.
The stream flows at first N.W. by W. into the plain, on reaching which it turns at a right-angle to the northeast, and skirts the foot of the Antilibanus range as far as Lebweh, where, being joined by a larger stream from the southeast,130 it takes its direction and flows N.W. and then N. across the plain to the foot of Lebanon.
But the properties of the right-angle triangle had long been studied and were well under stood. One acute angle of such a triangle determines the figure of the triangle itself. We have already seen that Thales, the very earliest of the Greek philosophers, measured the distance of a ship at sea by the application of this principle.
Perhaps in its pungent and aromatic sap ran something of the converted life and essence that had been their blood. Its bole, five feet of stalwart diameter, rose straight and tapering to the first right-angle limbs, each in itself almost a tree.
Just ahead was a sharp right-angle turn in the tunnel. I could see the river's flotsam hurtling against the rocky wall upon the left as it was driven on by the mighty current, and I feared for the safety of the U-33 in making so sharp a turn under such adverse conditions; but there was nothing for it but to try.
We must also get an idea of the length of the hull. Then, having gotten our figures, we'll have to glide back a little way, so as to give a right-angle broadside on at the hull of the derelict. Before firing the torpedo we'll first have to go far enough below water so that we'll know we're in fair line with that sunken hull yonder, for we've got to make our one loaded torpedo do the trick."
The extreme southwestern corner of Germany is an irregular right-angle, formed by the course of the Rhine. Within this angle and an hypothenuse drawn from the Lake of Constance to Carlsruhe lies a wild mountain-region a lateral offshoot from the central chain which extends through Europe from west to east known to all readers of robber-romances as the Black Forest.
The air blown through the reel strikes a very limited part of the nearer side of the halfpenny. In order to escape, it has to make a right-angle turn and pass between coin and reel, and, while travelling in this direction, loses most of its repulsive force.
He swept the beam of his light around and it steadied on an iron pipe. "Hey, look!" The pipe entered through the end of the tunnel, threaded into a right-angle pipe fitting, and disappeared into the tunnel floor! "So that's how the water comes out of the hillside!" Rick exclaimed. "The well was originally driven straight down, as a well should be, and the horizontal pipe was added later.
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