 | Alpheus Crosby - 1847 - 190 páginas
...144. At a given point A in a line AB, to make an angle equal to a given angle D. From D as a centre, with any radius, describe an arc cutting the sides of the angle in E and F. From A as a centre, with the same radius, describe an arc GH. In this arc, take H at the same... | |
 | William Minifie - 1849 - 278 páginas
...knowing this simple rule. PROBLEM 12. FIG. 4. To Trisect a Right Angle. 1st. From the angular point V with any radius, describe an arc cutting the sides of the angle, as in X and W. 2nd. With the same radius from the points X and W, cut the arc in Y and Z. 3rd. Draw... | |
 | Richard Burchett - 1855 - 164 páginas
...line A c, and the angle is bisected. FIG. 63. To trisect a Right Angle A. From the angular point A, with any radius, describe an arc cutting the sides of the angle in a and b. From a and b, with the same radius, cut off the arcs с ала. d. • FIG. 64. To find the... | |
 | Technical educator - 1871 - 858 páginas
...12). c DE (Figs. 13 and 14). — At A construct an angle «imilm- to the angle H ca — viz., j A i. From B, with any radius, describe an arc cutting the sides of the angle in-.'. From E, with the same radius, describe an arc, cutting ED in F. Measure the length from point c to... | |
 | William Alexander Myers - 1873 - 238 páginas
...knowing this simple rule. PROBLEM 12, FIGURE 4. To Trisect an Angle. 1st. From the angular point V, with any radius, describe an arc cutting the sides of the angle, as in X and W. 2nd. With the same radius, from the points X and W, cut the arc in Fand Z. 3rd. Draw... | |
 | William Alexander Myers - 1874 - 207 páginas
...knowing this simple rule. PROBLEM 12, FIGURE 4. To Trisect an Angle. 1st. From the angular point F, with any radius, describe an arc cutting the sides of the angle, as in JTand W. 2nd. With the same radius, from the points X and TF, cut the arc in Fand Z. 3rd. Draw... | |
 | Technical educator - 1877 - 862 páginas
...of the triangle o. To construct on the given line, DE, an angle similar to tlte angle ABC (Fig. 12). From B, with any radius, describe an arc cutting the sides of the angle in c d. From £, with the same radios, describe an arc, cutting : D in F. Measure the length from point c to d.... | |
 | John Courtney (boilermaker.) - 1880 - 170 páginas
...That is, to divide it in two equal angles. On the point of the \ angle, A, Fig. 32, as a centre, \ with any radius, describe an arc \ cutting the sides of the angle at D and E, and on D and E as centres, describe two arcs cutting each other \0 F Fig 32. •«^ C at... | |
 | John Courtney - 1880 - 174 páginas
...That is, to divide it in two equal angles. On the point of the \ angle, A, Fig. 32, as a centre, \ with any radius, describe an arc \ cutting the sides of the angle at D F Fig 32. ,' . and E, and on D and E as centres, / \ describe two arcs cutting each other •*... | |
 | Technical educator - 1880 - 850 páginas
...any radius, describe the quadrant D E. From D, with the radius DB, describe an arc cutting ED in F. From E, with the same radius, describe an arc cutting ED in o. Draw lines BF and B o, which will trisect right angle. THE MEASUREMENT OF ANOLES (Fig. 31). Angles... | |
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Most good practical workmen have several means for getting the cut of the mitre, and to them this demonstration will appear unnecessary, but I have seen many men make sad blunders, for want of knowing this simple rule. PROBLEM 12. 
