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added addition Algebra annex appear approximation Arithmetic base become Book called centre characters ciphers circle coefficient common consequently contained continued counters cube decimal Denary denominator difference digits divided dividend division divisor draw drawn eight equal equation equivalent evidently example expressed factors fifth figure five follows fore four fourth fraction give given greater guinea half Hence hundreds increased join latter less manner means measure meet method multiplied nine obtain obvious opposite parallel parallelogram preceding PROP proportionals quantity quotient ratio reason Reduce remain represented Required respectively result right angles root rule scale segment sides simple square stand straight line subtracted successive taken tens THEOREM third triangle twice units unity unknown quantity Wherefore whole
Pàgina 172 - Similar triangles are to one another in the duplicate ratio of their homologous sides.
Pàgina 170 - But by the hypothesis, it is less than a right angle ; which is absurd. Therefore the angles ABC, DEF are not unequal, that is, they are equal : And the angle at A is equal to the angle at D ; wherefore...
Pàgina 169 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Pàgina 127 - If two triangles have two sides of the one equal to two sides of the other, each to each, but the base of the one greater than the base of the other ; the angle also contained by the sides of that which has the greater base, shall be greater than the angle contained by the sides equal to them of the other.
Pàgina 169 - C to the remaining angle at F. For, if the angles ABC, DEF be not equal, one of them is greater than the other : Let ABC be the greater, and at the point B, in the straight line AB, make the angle ABG equal to the angle (23.
Pàgina 162 - If from a point without a circle there be drawn two straight lines, one of which cuts the circle, and the other meets it, and if the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, be equal to the square on GEOMETRY.
Pàgina 140 - EK, because EH is less than EK ; therefore the square of BH is greater than the square of FK, and the straight line BH greater than FK, and therefore BC is greater than FG.
Pàgina 107 - When any number of quantities are proportionals, as one antecedent is to its consequent, so is the sum of all the antecedents to the sum of all the consequents.