Elements of Plane and Solid GeometryGinn and Heath, 1877 - 398 σελίδες |
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Σελίδα iii
... con- stantly in view . All unnecessary discussions and scholia have been avoided ; and such methods have been adopted as experi- ence and attentive observation , combined with repeated trials , have shown to be most readily comprehended ...
... con- stantly in view . All unnecessary discussions and scholia have been avoided ; and such methods have been adopted as experi- ence and attentive observation , combined with repeated trials , have shown to be most readily comprehended ...
Σελίδα 5
... con- nected straight lines . When the word line is used a straight line is meant ; and when the word curve is used a curved line is meant . 11. DEF . A Plane Surface , or a Plane , is a surface in which , if any two points be taken ...
... con- nected straight lines . When the word line is used a straight line is meant ; and when the word curve is used a curved line is meant . 11. DEF . A Plane Surface , or a Plane , is a surface in which , if any two points be taken ...
Σελίδα 14
... int . alternate - interior . Iden . identical . Cons . construction . Sup . supplementary . Sup . adj . supplementary - adja- cent . Ex . exercise . Ill . illustration . 14 GEOMETRY . - BOOK I. SYMBOLS AND ABBREVIATIONS •
... int . alternate - interior . Iden . identical . Cons . construction . Sup . supplementary . Sup . adj . supplementary - adja- cent . Ex . exercise . Ill . illustration . 14 GEOMETRY . - BOOK I. SYMBOLS AND ABBREVIATIONS •
Σελίδα 17
... cons . ) . .. line CF : ← line FE , ( having their extremities in the same points ) . ..CFFE = 2 CF , CO + OE 2 CO . and But CO + OE < C F + FE , ( a straight line is the shortest distance between two points ) . Substitute and 2 CO for ...
... cons . ) . .. line CF : ← line FE , ( having their extremities in the same points ) . ..CFFE = 2 CF , CO + OE 2 CO . and But CO + OE < C F + FE , ( a straight line is the shortest distance between two points ) . Substitute and 2 CO for ...
Σελίδα 23
... con- taining all the points which possess a common property . Thus , the perpendicular erected at the middle of a straight line is the locus of all points equally distant from the extremni- ties of that straight line . 60. SCHOLIUM ...
... con- taining all the points which possess a common property . Thus , the perpendicular erected at the middle of a straight line is the locus of all points equally distant from the extremni- ties of that straight line . 60. SCHOLIUM ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
AABC ABCD altitude arc A B axis base and altitude bisect centre circle circumference circumscribed coincide conical surface COROLLARY cylinder denote diagonals diameter dihedral angle distance divided Draw equal respectively equally distant equilateral equivalent figure frustum Geometry given point greater Hence homologous sides hypotenuse intersection isosceles lateral area lateral edges lateral faces Let A B Let ABC limit line A B measured by arc middle point mutually equiangular number of sides opposite parallel parallelogram parallelopiped perimeter perpendicular plane MN prism prove pyramid Q. E. D. PROPOSITION radii radius equal ratio rectangles regular polygon right angles right triangle SCHOLIUM segment sides of equal similar polygons slant height sphere spherical angle spherical polygon spherical triangle square subtend surface symmetrical tangent tetrahedron THEOREM third side trihedral vertex vertices volume
Δημοφιλή αποσπάσματα
Σελίδα 132 - To describe an isosceles triangle having each of the angles at the base double of the third angle.
Σελίδα 140 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.
Σελίδα 206 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 40 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Σελίδα 353 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Σελίδα 179 - Any two rectangles are to each other as the products of their bases by their altitudes.
Σελίδα 192 - In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Σελίδα 150 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.