Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 60
- ii SIMILAR RECTILINEAL FIGURES—AREAS 45 … Simpsotis second rule.—Number of divisions a multiple of 3. When n ■■ When «=3, or 6, or 9, or 12, etc. Jm = k (7/0 + Zh\ + 3A2 + *3). + K-z) + 3(^1 + *a + ;h + h + - • ■+ K-*. + K-i)} ■ Weddles rule.—Number of divisions a multiple of 6. When n = 6. ym = fa {AQ + K + At + hQ + 5(A± + hz + hb) +…