Plane and Solid Geometry: To which is Added Plane and Spherical Trigonometry and Mensuration. Accompanied with All the Necessary Logarithmic and Trigonometric TablesD. Appleton & Company, 1856 - 235 σελίδες |
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Αποτελέσματα 1 - 5 από τα 45.
Σελίδα 10
... joining any two of its points , will coincide . XVIII . When a surface is not a plane surface it is called a Curved surface . XIX . A plane figure is a limited portion of a plane . When it is limited by straight lines , the figure is ...
... joining any two of its points , will coincide . XVIII . When a surface is not a plane surface it is called a Curved surface . XIX . A plane figure is a limited portion of a plane . When it is limited by straight lines , the figure is ...
Σελίδα 11
... joining the vertices of two angles , not adjacent . DEFINITIONS OF TERMS . I. A demonstration is a logical train of reasoning employed to establish an asserted truth . II . A proposition is a statement of a truth to be demonstrated , or ...
... joining the vertices of two angles , not adjacent . DEFINITIONS OF TERMS . I. A demonstration is a logical train of reasoning employed to establish an asserted truth . II . A proposition is a statement of a truth to be demonstrated , or ...
Σελίδα 13
... joining two given points . XIV . Straight lines which are parallel to the same line are parallel to each other . POSTULATES . I. Let it be granted that a straight line may be drawn from any point to any other point . II . That a ...
... joining two given points . XIV . Straight lines which are parallel to the same line are parallel to each other . POSTULATES . I. Let it be granted that a straight line may be drawn from any point to any other point . II . That a ...
Σελίδα 21
... joining the points C and F , which is im- possible ( A. XIII . ) . Hence , from a point with- out a straight line only one perpendicular can be drawn to this line . A B D E F THEOREM XII . If from a point without a line , a ...
... joining the points C and F , which is im- possible ( A. XIII . ) . Hence , from a point with- out a straight line only one perpendicular can be drawn to this line . A B D E F THEOREM XII . If from a point without a line , a ...
Σελίδα 23
... join G and E : then will GH be less than GE ( T. XII . ) . But GE is less than GD + DE ( T. VII . ) ; therefore , GH is less than GD + DE , or less than GD + DF , since by the first case of this Theorem DF = DE . Hence , finally , GH is ...
... join G and E : then will GH be less than GE ( T. XII . ) . But GE is less than GD + DE ( T. VII . ) ; therefore , GH is less than GD + DE , or less than GD + DF , since by the first case of this Theorem DF = DE . Hence , finally , GH is ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
a+b+c altitude apothem bisect centre chord circumference circumscribed cone consequently corresponding cosec Cosine Cotang cube cubic cylinder decimal denote diameter dicular divided draw drawn equation equivalent exterior angles feet figure frustum Geom give greater half hence hypotenuse inches intersection logarithm measure multiplied number of sides opposite parallel parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN polyedral angle polyedron prism PROBLEM proportion pyramid quadrant radii radius ratio rectangle regular inscribed regular polygon respectively equal right angles right-angled triangle Scholium secant sector similar similar triangles Sine slant height solid solve the triangle sphere spherical triangle square straight line subtract suppose surface Tang tangent THEOREM three sides triangle ABC triangular prism volume ΙΟ
Δημοφιλή αποσπάσματα
Σελίδα 35 - 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.
Σελίδα 80 - 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'.
Σελίδα 139 - 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.
Σελίδα 17 - The sum of all the angles of a polygon is equal to twice as many right angles as the polygon has sides, less two.
Σελίδα 176 - The radius of a sphere is a straight line, drawn from the centre to any point of the...
Σελίδα 182 - Every section of a sphere, made by a plane, is a circle.
Σελίδα 28 - If two triangles have two sides of the one equal respectively to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second. Given A ABC and A'B'C ' with Proof STATEMENTS Apply A A'B'C ' to A ABC so that A'B
Σελίδα 165 - ... bases simply : hence two prisms of the same altitude are to each other as their bases. For a like reason, two prisms of the same base are to each other as their altitudes.
Σελίδα 29 - ... to two sides of the other, but the third side of the first greater than the third side of the second, the angle opposite the third side of the first is.
Σελίδα 13 - If equals be added to unequals, the wholes are unequal. V. If equals be taken from unequals, the remainders are unequal. VI. Things which are double of the same, are equal to one another.