Elements of Geometry and Trigonometry: With Practical ApplicationsR.S. Davis & Company, 1862 - 490 páginas |
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Página 12
... gles ; as the parallelogram IJKL . A RHOMBUS is a rhomboid whose sides are equal ; as the rhomboid MNOP . H G E F L K I J P M4 N 28. A TRAPEZOID is a quadrilateral which has only two of its sides par- allel ; as the quadrilateral RSTU ...
... gles ; as the parallelogram IJKL . A RHOMBUS is a rhomboid whose sides are equal ; as the rhomboid MNOP . H G E F L K I J P M4 N 28. A TRAPEZOID is a quadrilateral which has only two of its sides par- allel ; as the quadrilateral RSTU ...
Página 30
... gles BGH , CHG equal ; I E G B A 0 K then the lines A B , CD will be parallel . For , if the lines A B , CD are not parallel , let C H F them meet in some point K , and through O , the middle point of GH , draw the straight line IK ...
... gles BGH , CHG equal ; I E G B A 0 K then the lines A B , CD will be parallel . For , if the lines A B , CD are not parallel , let C H F them meet in some point K , and through O , the middle point of GH , draw the straight line IK ...
Página 32
... gles ( Prop . I. ) ; take away BGH , which is common to both , and there remains the angle GHD , equal to the angle AGH ; and these are alternate angles ; hence the lines AB , CD are parallel . 85. Cor . If two straight lines A are ...
... gles ( Prop . I. ) ; take away BGH , which is common to both , and there remains the angle GHD , equal to the angle AGH ; and these are alternate angles ; hence the lines AB , CD are parallel . 85. Cor . If two straight lines A are ...
Página 37
... gles ABC , BCA , and C A B is equal to two right angles ( Art . 34 , Ax . 2 ) . 96. Cor . 1. Two angles of a triangle being given , or merely their sum , the third will be found by subtracting that sum from two right angles . 97. Cor ...
... gles ABC , BCA , and C A B is equal to two right angles ( Art . 34 , Ax . 2 ) . 96. Cor . 1. Two angles of a triangle being given , or merely their sum , the third will be found by subtracting that sum from two right angles . 97. Cor ...
Página 61
... bisects the base A B at right angles ; therefore CE bisects also the angle ACB ( Prop . VII . Cor . 2 , Bk . I. ) . gles A CD , D C B are equal , the arcs A E , Since the an- EB are equal ( Prop . V. ) ; hence the radius CE 6 BOOK III . 61.
... bisects the base A B at right angles ; therefore CE bisects also the angle ACB ( Prop . VII . Cor . 2 , Bk . I. ) . gles A CD , D C B are equal , the arcs A E , Since the an- EB are equal ( Prop . V. ) ; hence the radius CE 6 BOOK III . 61.
Otras ediciones - Ver todas
Elements of Geometry and Trigonometry: With Practical Applications Benjamin Greenleaf Vista completa - 1869 |
Elements of Geometry and Trigonometry: With Practical Applications Benjamin Greenleaf Vista completa - 1867 |
Términos y frases comunes
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
Pasajes populares
Página 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.
Página 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.
Página 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.
Página 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.
Página 77 - Two rectangles having equal altitudes are to each other as their bases.
Página 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.
Página 313 - FRACTION is a negative number, and is one more tftan the number of ciphers between the decimal point and the first significant figure.
Página 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.
Página 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'.
Página 244 - RULE. — Multiply the base by the altitude, and the product will be the area.