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Updated: May 12, 2025
In Egypt, if the surveyors were unaware of the true relation between a triangle and the rectangle on the same base, they had yet established the carpenter's rule of 3, 4 and 5 for the sides of a right-angled triangle. How much the Greeks drew from the ancient priesthoods we shall never know, nor how far the priests had advanced in those theories of general relations which we call scientific.
When Pythagoras discovered the theorem of the squares erected on the sides of a right-angled triangle, it had the effect on him of a most preposterous joke. The apple dropping on the head of Newton struck him like a very far-fetched pun. Show a child the picture of a wild Tartar, and his first motion will be to laugh at it.
The lamp had a tilted shade that threw a slanting bar of shadow across the field of reflection, lighting a right-angled triangle very brightly and leaving the rest obscure. The bed was a very great one, a bed for the Anakim. It had a canopy with yellow silk curtains, surmounted by a gilded crown of carved wood.
The right-angled triangle still has an hypotenuse, and quadratics do not simplify with distance, while Tamil classics throw Vergil and Cicero into the shade. The fact that high school work is all carried on in English is the biggest stumbling block in the Indian schoolgirl's road to learning.
The commutator is so constructed as to keep the coil, B, on short circuit from the position of coincidence with the plane of C to the position where the plane of B is at right angles to that of C; and to keep the coil, B, open-circuited from the right-angled position, or thereabouts, to the position of parallel or coincident planes.
In making a hotbed what we seek to do is to imitate Nature at her best, so get the best soil and the sunniest spot you can find. In all hotbeds the underlying principle is the same: They are right-angled boxes covered with glass panes set in movable frames and placed over heated excavations.
He is a scalene triangle, and must be judged, accordingly, upon irregular, lop-sided principles; whereas you and I, common-place mortals, are produced, like the earth, which is our preponderating element, with our triangles all right-angled, comfortable and complete, for which blessing let us thank Providence, and be charitable to those who are necessarily windy and gaseous, from that unlucky scalene triangle upon which they have had the misfortune to be constructed, and which, you perceive, is quite at variance with the mathematical constitution of the earth!"
We were nearing a skew bridge, with an almost right-angled approach; and the strange resultant of the nicely balanced forces that control an automobile skating on "pneus" over slippery mud twisted us round, suddenly and without warning. Instantly, oilily, the car gyrated as on a pivot, and behold, we were facing down the valley instead of up. Terry could not had done it had he tried.
So standing, and so occupied, suddenly we were alarmed by shouts as of some great mob manifestly in rapid motion, and probably, at this instant taking the right-angled turn into the lane connecting Greenhay with the Oxford Road.
"See if these notes are all clear," directed the chief engineer. "Yes, sir; I know what the notes call for," Tom answered confidently. "Then I'll show you just what's wanted Reade," continued the chief. After some minutes of explanation Tom picked up the T-square, placing the top at the side of the drawing surface. Then against the limb of the "T" Tom laid the base of a right-angled triangle.
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