An Elementary Geometry |
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Page 4
... given angle . Thus ( Fig . in Art . 7 ) , the complement of A CD is ACF - ACD = DC F. 6. The Supplement of an angle ... line , in the same plane , is equal to two right angles . Let DC and EC meet the straight line AB at the point ...
... given angle . Thus ( Fig . in Art . 7 ) , the complement of A CD is ACF - ACD = DC F. 6. The Supplement of an angle ... line , in the same plane , is equal to two right angles . Let DC and EC meet the straight line AB at the point ...
Page 15
... line , 1st . The perpendicular is shorter than any oblique line . 2d . Any two oblique lines equally distant from the perpendicu- lar are equal . 3d . Of two oblique lines the more remote is the greater . Let A be the given point , BC the A ...
... line , 1st . The perpendicular is shorter than any oblique line . 2d . Any two oblique lines equally distant from the perpendicu- lar are equal . 3d . Of two oblique lines the more remote is the greater . Let A be the given point , BC the A ...
Page 20
... given polygon ; the sum of all the interior angles A , B , C , D , E , F ... line , in the same plane , contain respectively 15 ° , 27 ° , and 99 ° , how ... line AB are two lines making with A B , at the point A , the first an ...
... given polygon ; the sum of all the interior angles A , B , C , D , E , F ... line , in the same plane , contain respectively 15 ° , 27 ° , and 99 ° , how ... line AB are two lines making with A B , at the point A , the first an ...
Page 47
... line , or a given line produced , the distances of the point from the extremities of the line are called the segments . If the point is within the given line , the sum of the segments , if in the line produced , the difference of the ...
... line , or a given line produced , the distances of the point from the extremities of the line are called the segments . If the point is within the given line , the sum of the segments , if in the line produced , the difference of the ...
Page 61
... line that can be drawn from any point to a given circumference lies on the line that passes from the point to the centre of the circle . 46. Two parallels cutting the circumference of a circle intercept equal arcs . 47. A straight line ...
... line that can be drawn from any point to a given circumference lies on the line that passes from the point to the centre of the circle . 46. Two parallels cutting the circumference of a circle intercept equal arcs . 47. A straight line ...
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Common terms and phrases
ABC and DEF ABCD adjacent altitude angle ABC apothem base and altitude bisect centre chord circ circumference coincide cone construct the triangle convex surface Corollary cube cylinder diameter distance divided dodecagon EATON'S equal altitudes equally distant equiangular equilateral feet frustum given angle given circle given line given point given side given square given triangle half the arc hexagon homologous sides hypothenuse included angle infinite number inscribed internal angles intersection isosceles triangle Let ABCDEF line joining mean proportional measured by half number of sides opposite sides parallel planes parallelogram parallelopiped perimeter perpendicular plane parallel propositions quadrilateral radii radius ratio rectangle regular polygon respectively equal rhombus right angles right prism right pyramid right triangle Scholium secant segment similar triangles slant height sphere tangent THEOREM VIII trapezoid triangle ABC vertex
Popular passages
Page 25 - Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth.
Page 30 - If any number of quantities 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 Now ab = ab (1) and by Theorem I.
Page 27 - If the product of two quantities is equal to the product of two others, the...
Page 43 - The area of a regular polygon is equal to half the product of its perimeter and apothem.
Page 11 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Page 23 - If two triangles have two sides of one respectively equal to two sides of the other, but the third sides unequal...
Page 20 - ... polygon, is equal to twice as many right angles as the polygon has sides minus two.
Page 49 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Page 70 - A right cylinder is a solid described by the revolution of a rectangle about one of its sides.
Page 64 - DEFINITIONS. 1 . A straight line is perpendicular to a plane, when it is perpendicular to every straight line of the plane which it meets.