Elements of Geometry and Trigonometry |
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Page 9
... extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A straight line is the shortest distance from one point to another . 4. Every line which is not ...
... extremities of a line are called points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A straight line is the shortest distance from one point to another . 4. Every line which is not ...
Page 18
... extremities of either side , their sum will be less than the sum of the two other sides of the triangle . Let any point , as O , be taken within the trian- gle BAC , and let the lines OB , OC , be drawn to the extremities of either side ...
... extremities of either side , their sum will be less than the sum of the two other sides of the triangle . Let any point , as O , be taken within the trian- gle BAC , and let the lines OB , OC , be drawn to the extremities of either side ...
Page 23
... extremities of the line . 2d , Every point , without the perpendicular , will be unequally dis- tant from those extremities . Let AB be the given straight line , C the BOOK I. 23.
... extremities of the line . 2d , Every point , without the perpendicular , will be unequally dis- tant from those extremities . Let AB be the given straight line , C the BOOK I. 23.
Page 24
... extremities A and B. Cor . If a straight line have two points D and F , equally dis- tant from the extremities A and B , it will be perpendicular to AB at the middle point C. PROPOSITION XVII . THEOREM . If two right angled triangles ...
... extremities A and B. Cor . If a straight line have two points D and F , equally dis- tant from the extremities A and B , it will be perpendicular to AB at the middle point C. PROPOSITION XVII . THEOREM . If two right angled triangles ...
Page 41
... extremities of the arc . 6. A straight line is said to be inscribed in a circle , when its extremities are in the cir- cumference , as AB . An inscribed angle is one which , like BAC , has its vertex in the circumference , and is formed ...
... extremities of the arc . 6. A straight line is said to be inscribed in a circle , when its extremities are in the cir- cumference , as AB . An inscribed angle is one which , like BAC , has its vertex in the circumference , and is formed ...
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Common terms and phrases
adjacent altitude angle ACB angle BAC ar.-comp base multiplied bisect Book VII centre chord circ circumference circumscribed common cone convex surface cosine Cotang cylinder diagonal diameter dicular distance divided draw drawn equally distant equations equivalent feet figure find the area formed four right angles frustum given angle given line gles greater homologous sides hypothenuse inscribed circle inscribed polygon intersection less Let ABC logarithm number of sides opposite parallelogram parallelopipedon pendicular perimeter perpen perpendicular perpendicular let fall plane MN polyedron polygon ABCDE PROBLEM proportional PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon right angled triangle S-ABCDE Scholium secant segment similar sine slant height solid angle solid described sphere spherical polygon spherical triangle square described straight line tang tangent THEOREM triangle ABC triangular prism vertex
Popular passages
Page 19 - 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 232 - ... the logarithm of a fraction is equal to the logarithm of the numerator minus the logarithm of the denominator.
Page 11 - A right-angled triangle is one which has a right angle. The side opposite the right angle is called the hypothenuse.
Page 168 - The radius of a sphere is a straight line drawn from the centre to any point of the surface ; the diameter or axis is a line passing through this centre, and terminated on both sides by the surface.
Page 31 - Hence, the interior angles plus four right angles, is equal to twice as many right angles as the polygon...
Page 18 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.
Page 20 - In an isosceles triangle the angles opposite the equal sides are equal.
Page 86 - 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 159 - S-ahc be the smaller : and suppose Aa to be the altitude of a prism, which having ABC for its base, is equal to their difference. Divide the altitude AT into equal parts Ax, xy, yz, &c. each less than Aa, and let k be one of those parts ; through the points of division...
Page 64 - To inscribe a circle in a given triangle. Let ABC be the given triangle. Bisect the angles A and B by the lines AO and BO, meeting at the point 0.