A text book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained (1849)
actical workmen have several means for getting the cut of themitre, and to them this demonstration will appear unnecessary, but I haveseen many men make sad blunders, for want of knowing this simple rule. Problem 12. Fig. 4. To Trisect a Right Angle, 1st. From the angular point V with any radius,… … /f Miitillf. PLATE V. 19 Problem 13. Fig. 5, In the triangle A. B. C^ to describe a Circle touching all its sides, 1st. Bisect two of the angles by problem 11^ as J^ and B, the dividing lines will cut each other in D, then D is the centre of the circle.2nd. From D let fall a perpendicular to either…
