Elements of Geometry and Trigonometry: With Practical Applications |
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Page 13
... homologous sides or angles . AXIOMS . 34. An AXIOM is a self - evident truth ; such as , 1. Things which are equal to the same thing , are equal to each other . 2. If equals be added to equals , the sums will be equal . 3. If equals be ...
... homologous sides or angles . AXIOMS . 34. An AXIOM is a self - evident truth ; such as , 1. Things which are equal to the same thing , are equal to each other . 2. If equals be added to equals , the sums will be equal . 3. If equals be ...
Page 46
... homologous or like terms , and so also are the consequents . 128. All the terms of a proportion are called PROPOR- TIONALS ; and the last term is called a FOURTH PROPOR- TIONAL to the other three taken in their order . Thus , in the ...
... homologous or like terms , and so also are the consequents . 128. All the terms of a proportion are called PROPOR- TIONALS ; and the last term is called a FOURTH PROPOR- TIONAL to the other three taken in their order . Thus , in the ...
Page 99
... homologous sides proportional , and are similar . Let the two triangles ABC , DCE be equiangular ; the angle BAC F being equal to the angle CDE , the angle ABC to the angle DCE , and the angle ACB to the angle DE C , then the homologous ...
... homologous sides proportional , and are similar . Let the two triangles ABC , DCE be equiangular ; the angle BAC F being equal to the angle CDE , the angle ABC to the angle DCE , and the angle ACB to the angle DE C , then the homologous ...
Page 100
... homologous sides are opposite to the equal angles ; thus the angle A CB being equal to D E C , the side AB is homologous to DC ; in like manner , A C and D E are homologous . PROPOSITION XXIII . - THEOREM . 262. Triangles which have ...
... homologous sides are opposite to the equal angles ; thus the angle A CB being equal to D E C , the side AB is homologous to DC ; in like manner , A C and D E are homologous . PROPOSITION XXIII . - THEOREM . 262. Triangles which have ...
Page 103
... homologous ; and when they have them perpendicular , the perpendicular sides are homologous . Thus , DE is homologous with AB , BOOK IV . 103.
... homologous ; and when they have them perpendicular , the perpendicular sides are homologous . Thus , DE is homologous with AB , BOOK IV . 103.
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Common terms and phrases
A B C ABCD adjacent angles altitude angle equal base bisect centre chord circle circumference circumscribed cone convex surface cosec cosine Cotang cylinder diagonal diameter distance divided drawn equal Prop equilateral triangle equivalent exterior angle feet formed frustum gles greater half the sum hence homologous hypothenuse inches included angle inscribed less Let ABC line A B logarithm logarithmic sine mean proportional measured by half multiplied number of sides parallel parallelogram parallelopipedon pendicular perimeter perpendicular polyedron prism PROBLEM PROPOSITION pyramid quadrantal radii radius ratio rectangle regular polygon right angles right-angled triangle rods Scholium secant segment side A B similar sine slant height solidity solve the triangle sphere spherical polygon spherical triangle Tang tangent THEOREM triangle ABC triangle equal trigonometric functions vertex
Popular passages
Page 35 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 57 - 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 117 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.
Page 50 - If any number of magnitudes are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let A : B : : C : D : : E : F; then will A : B : : A + C + E : B + D + F.
Page 77 - Two rectangles having equal altitudes are to each other as their bases.
Page 158 - If a straight line is perpendicular to each of two straight lines at their point of intersection, it is perpendicular to the plane of those lines.
Page 313 - FRACTION is a negative number, and is one more tftan the number of ciphers between the decimal point and the first significant figure.
Page 314 - The logarithm of any POWER of a number is equal to the product of the logarithm of the number by the exponent of the power. For let m be any number, and take the equation (Art.
Page 100 - 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'.
Page 244 - RULE. — Multiply the base by the altitude, and the product will be the area.