Plane and Solid Geometry: To which is Added Plane and Spherical Trigonometry and Mensuration. Accompanied with All the Necessary Logarithmic and Trigonometric Tables |
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Page 17
... denote by the capital letters A , B , C , etc. , while their corresponding in- terior angles are denoted by the small let- ters a , b , c , etc. Now any exterior angle , together with its ad- jacent interior angle , as A + a , is equal ...
... denote by the capital letters A , B , C , etc. , while their corresponding in- terior angles are denoted by the small let- ters a , b , c , etc. Now any exterior angle , together with its ad- jacent interior angle , as A + a , is equal ...
Page 59
... denote the greater radius by R , the less radius by R ' , and the distance between their centres by D , we shall have , when the circles are exterior , D > R + R ' , and when they are interior — that is , when the one is wholly within ...
... denote the greater radius by R , the less radius by R ' , and the distance between their centres by D , we shall have , when the circles are exterior , D > R + R ' , and when they are interior — that is , when the one is wholly within ...
Page 91
... denote the linear units in the base and altitude respectively . This measure , however , is not absolute , but only relative . It supposes that the area of any other rectangle is estimated in a similar manner , by measuring its sides by ...
... denote the linear units in the base and altitude respectively . This measure , however , is not absolute , but only relative . It supposes that the area of any other rectangle is estimated in a similar manner , by measuring its sides by ...
Page 92
... denote the product of two unequal numbers ; but we use the term square to denote the product of a number multiplied by itself . The squares of the numbers 1 , 2 , 3 , etc. , are 1 , 4 , 9 , etc. From which we see that the square formed ...
... denote the product of two unequal numbers ; but we use the term square to denote the product of a number multiplied by itself . The squares of the numbers 1 , 2 , 3 , etc. , are 1 , 4 , 9 , etc. From which we see that the square formed ...
Page 105
... denote the three sides BC , AC , AB of the triangle ABC , and R the radius of its circumscribing circle . Draw the diameter COC ' = 2R , also the supplementary chords AC ' , BC ' . Now the inscribed quadrilateral ACBC ' will give AB ...
... denote the three sides BC , AC , AB of the triangle ABC , and R the radius of its circumscribing circle . Draw the diameter COC ' = 2R , also the supplementary chords AC ' , BC ' . Now the inscribed quadrilateral ACBC ' will give AB ...
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Common terms and phrases
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
Popular passages
Page 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.
Page 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'.
Page 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.
Page 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.
Page 176 - The radius of a sphere is a straight line, drawn from the centre to any point of the...
Page 182 - Every section of a sphere, made by a plane, is a circle.
Page 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
Page 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.
Page 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.
Page 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.