Elements of Geometry: With Practical Applications Designed for BeginnersD. Appleton, 1853 - 320 σελίδες |
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Σελίδα 8
... formed upon plane surfaces by stretching upon the surface a flexible cord , previously rubbed over with chalk . The middle portion of the cord is then raised , and allowed to recoil by its elasticity , 8 ELEMENTS OF GEOMETRY .
... formed upon plane surfaces by stretching upon the surface a flexible cord , previously rubbed over with chalk . The middle portion of the cord is then raised , and allowed to recoil by its elasticity , 8 ELEMENTS OF GEOMETRY .
Σελίδα 9
... formed at the fold will form a very good approximation to a straight line . ( 8. ) A straight line is sometimes defined as one which , throughout its whole extent , does not change its direction . And , in accordance with this ...
... formed at the fold will form a very good approximation to a straight line . ( 8. ) A straight line is sometimes defined as one which , throughout its whole extent , does not change its direction . And , in accordance with this ...
Σελίδα 11
... formed , which angle is the difference of direction of the two lines . X. When a straight line AB is met by another straight line DC , so as to make the adjacent angles ACD , BCD equal to each other , each is called a right - angle ...
... formed , which angle is the difference of direction of the two lines . X. When a straight line AB is met by another straight line DC , so as to make the adjacent angles ACD , BCD equal to each other , each is called a right - angle ...
Σελίδα 13
... formed into angles of various magnitudes , according to the materials to be cut . As a general rule , the softer the material to be divided , the more acute is the angle of the cutting edge . Chisels for cutting wood are formed with an ...
... formed into angles of various magnitudes , according to the materials to be cut . As a general rule , the softer the material to be divided , the more acute is the angle of the cutting edge . Chisels for cutting wood are formed with an ...
Σελίδα 19
... formed , such as are mentioned in the foregoing Postulates . Any person who will admit the truth of these axioms , and grant the postulates , will be compelled to admit the truth of all subsequent theorems which shall be legitimately ...
... formed , such as are mentioned in the foregoing Postulates . Any person who will admit the truth of these axioms , and grant the postulates , will be compelled to admit the truth of all subsequent theorems which shall be legitimately ...
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a+b+c altitude angle ABC angle ACD angle BAC bisect centre chord circ circular sector circumference circumscribed polygon coincide cone consequently convex surface cylinder diagonal diameter distance draw equal and parallel equiangular equilateral triangle equivalent exterior angle ference figure formed given line greater half the arc hypothenuse inscribed circle intersection isosceles join less Let ABC line CD lines drawn magnitude measured by half meet multiplied number of sides opposite angles parallel lines parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN point G prism PROBLEM produced Prop proportional PROPOSITION pyramid radii radius rectangle regular polygon respectively equal right-angled triangle Sabc Schol Scholium scribed semicircle semicircumference side AC similar solid angle sphere spherical polygon square straight line suppose tangent THEOREM three sides triangle ABC triangular prism vertex VIII