Shaw's Civil architecture; being a complete theoretical and practical system of building, containing the fundamental principles of the art . A h P U A C T 1 C A L G E O M E T11Y , 41 PROBLEM XVI. To describe the segment of a circle to anylength, A B, and breadtli, C D. 1. Bisect A B, by (lie perpendicular D g; cuttingA B in C. 2. From r, make c D on the perpendicular equalto C D. 3. Bisect A D, by a perpendicular e f, cutting D g ill S- 4. Upon g-, the centre, describe A D B; it will bethe segment required. PROBLEM XVII. To describe the segment of a circle, by meansof two rules, to any length,
Shaw's Civil architecture; being a complete theoretical and practical system of building, containing the fundamental principles of the art . A h P U A C T 1 C A L G E O M E T11Y , 41 PROBLEM XVI. To describe the segment of a circle to anylength, A B, and breadtli, C D. 1. Bisect A B, by (lie perpendicular D g; cuttingA B in C. 2. From r, make c D on the perpendicular equalto C D. 3. Bisect A D, by a perpendicular e f, cutting D g ill S- 4. Upon g-, the centre, describe A D B; it will bethe segment required. PROBLEM XVII. To describe the segment of a circle, by meansof two rules, to any length, A B, and per-pendicular height, C D, in the middle of AB, without making use of the centre. It will be most convenient for practice to make therules C E and C F each equal to A B, as room issometimes wanted. 1. Place the rules to the height at C, bring theedges close to A and B, tack them together at C, andfix a rod across to keep them tight. 2. Put in pins at A and B, then move your rulesround these pins ; hold a pencil to the angular pointat C; it will describe the segment required. Fig. 2. Bi/ means of a triangle. Let A B be the l
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
