Elements of GeometryAmerican Book Company, 1896 - 540 sider |
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Side 36
... base . The opposite vertex is called the vertex of the isosceles tri- angle , and the angle at that vertex the vertex angle . An equilateral triangle is one whose three sides are equal . PROPOSITION XVIII . THEOREM 71. The angles at the ...
... base . The opposite vertex is called the vertex of the isosceles tri- angle , and the angle at that vertex the vertex angle . An equilateral triangle is one whose three sides are equal . PROPOSITION XVIII . THEOREM 71. The angles at the ...
Side 69
... base of an isosce- les triangle perpendiculars to the sides are drawn , their sum is the same wherever the point is situated ( and is equal to the perpendicular from one extremity of the base to the op- posite side ) . 141. Exercise ...
... base of an isosce- les triangle perpendiculars to the sides are drawn , their sum is the same wherever the point is situated ( and is equal to the perpendicular from one extremity of the base to the op- posite side ) . 141. Exercise ...
Side 129
Andrew Wheeler Phillips, Irving Fisher. 289. Defs . The base of a triangle is that side upon which the triangle is supposed to stand . The altitude is the perpendicular to the base from the opposite vertex . PROPOSITION VII . THEOREM 290 ...
Andrew Wheeler Phillips, Irving Fisher. 289. Defs . The base of a triangle is that side upon which the triangle is supposed to stand . The altitude is the perpendicular to the base from the opposite vertex . PROPOSITION VII . THEOREM 290 ...
Side 131
... base into equal parts , divide a parallel to the base into equal parts also . 293. Exercise . - Two men , on opposite sides of a street , walk in opposite directions , and so that a tree between them always hides each from the other ...
... base into equal parts , divide a parallel to the base into equal parts also . 293. Exercise . - Two men , on opposite sides of a street , walk in opposite directions , and so that a tree between them always hides each from the other ...
Side 162
... base of an isosceles triangle is 60 cm . , and each of its sides is 50 cm . , find the length of its altitude in inches . ( 19. ) If the base of an isosceles triangle is b , and its alti- tude , find the sides . ( 20. ) Find the ...
... base of an isosceles triangle is 60 cm . , and each of its sides is 50 cm . , find the length of its altitude in inches . ( 19. ) If the base of an isosceles triangle is b , and its alti- tude , find the sides . ( 20. ) Find the ...
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Vanlige uttrykk og setninger
ABCD adjacent angles allel altitude angles are equal apothem axis bisecting bisector centre chord circumference circumscribed coincide construct Def.-The Defs Defs.-A diagonals diameter diedral angles distance divided draw equally distant equilateral triangle equivalent Exercise.-The face angles figure Find the area frustum geometry given circle given line given point given straight line GIVEN TO PROVE given triangle Hence hypotenuse lateral area lateral edges lateral faces locus meet middle points number of sides parallel lines parallelogram parallelopiped perimeter perpendicular plane geometry plane MN polyedral angle polyedron prism prismatic surface pyramid Q. E. D. PROPOSITION quadrilateral radical axis radii radius ratio of similitude rectangle regular polygon right angles right triangle segment similar slant height sphere spherical polygon spherical triangle square straight line joining surface symmetrical tangent tetraedron THEOREM triangle ABC triangles are equal triangular prism triedral vertex vertices volume
Populære avsnitt
Side 30 - If two triangles have two sides and the included angle of one, equal respectively to two sides and the included angle of the other, the triangles are equal. C...
Side 466 - The area of a regular inscribed hexagon is a mean proportional between the areas of the inscribed and circumscribed equilateral triangles.
Side 315 - The frustum of a triangular pyramid is equivalent to the sum of three pyramids whose common altitude is the altitude of the frustum and whose bases are the lower base, the upper base, and a mean proportional between the two bases of the frustum.
Side 205 - The areas of two regular polygons of the same number of sides are to each other as the squares of their radii or as the squares of their apothems.
Side 36 - ... greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Side 379 - Two triangles are congruent if (a) two sides and the included angle of one are equal, respectively, to two sides and the included angle of the other...
Side 138 - ... twice the product of one of these sides and the projection of the other side upon it.
Side 57 - The straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it.
Side 137 - If from a point without a circle a tangent and a secant be drawn, the tangent is a mean proportional between the whole secant and its external segment.
Side 147 - The product of two sides of a triangle is equal to the product of the diameter of the circumscribed circle and the altitude upon the third side.