## Elements of Geometry |

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### Common terms and phrases

ABCD adjacent angles algebraic algebraic quantities altitude angle ACB base centre chord circ circle circular sector circumference circumscribed coefficient cone consequently contains Corollary cube cube root cylinder degree Demonstration denominator denoted diameter divided dividend division enunciation equal equivalent evident example exponent expression factors figure fraction frustum given gives greater greatest common divisor hence homologous sides inscribed less letters logarithm manner measure multiplied obtain parallel parallelogram parallelopiped perpendicular plane angles polyedron preceding prism proportion proposed equation proposition quotient radical sign radii radius ratio rectangle reduced regular polygon remainder result right angles Scholium side BC similar solid angle sphere spherical square root straight line substitute subtract suppose term THEOREM third tion triangle ABC triangular prism triangular pyramids unity unknown quantity vertex whence whole numbers

### Popular passages

Page 65 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.

Page 9 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.

Page 155 - THE sphere is a solid terminated by a curve surface, all the points of which are equally distant from a point within, called the centre.

Page 80 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.

Page 27 - Two equal chords are equally distant from the centre ; and of two unequal chords, the less is at the greater distance from the centre.

Page 54 - The sum of the squares on the sides of a parallelogram is equal to the sum of the squares on the diagonals.

Page 164 - If two triangles have two sides and the inchtded angle of the one respectively equal to two sides and the included angle of the other, the two triangles are equal in all respects.

Page 207 - In every triangle the sum of the three angles is equal to two right angles.

Page 166 - In any spherical triangle, the greater side is opposite the greater angle ; and conversely, the greater angle is opposite the greater side.

Page 145 - If a pyramid is cut by a plane parallel to its base, the...