. as required. Practical Geometry. 11 5. Tofiiid the centre of a circle, or radius, thatshall cut any three given points^ not in a direct line. From the middle point ^ as a centre, with anyradius, as 6 c, h d, describe a portion of a circle,as c s d, and from r and t as centres, with anequal radius, cut the portion of the circle in c sand d s ; draw lines through where the arcs cuteach other ; and the intersection of the lines at8 is the centre of the circle as required. 6. To find the centre of a given circle. Bisect any chord in th
. as required. Practical Geometry. 11 5. Tofiiid the centre of a circle, or radius, thatshall cut any three given points^ not in a direct line. From the middle point ^ as a centre, with anyradius, as 6 c, h d, describe a portion of a circle,as c s d, and from r and t as centres, with anequal radius, cut the portion of the circle in c sand d s ; draw lines through where the arcs cuteach other ; and the intersection of the lines at8 is the centre of the circle as required. 6. To find the centre of a given circle. Bisect any chord in the circle, as A B, by aperpendicular, CD ; bisect also the diameter EDin/; and the intersection of the lines at/is thecentre of the circle required. 7. To find the length of any given arc of acircle. With the radius A C, equal to Jth the lengthof the chord of the arc A B, and from A as acentre, cut the arc in c; also from B as a centre,with equal radius, cut the chord in h; draw theline C h; and twice the length of the C line is the length of the arc c
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectenginee, bookyear1856
