## Elements of Geometry and Trigonometry |

### From inside the book

Page 41

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**circle**is a curved line , all the points of which are equally distant from a point within , called the centre . The**circle**is the space terminated by A this curved line . *酱 F H G 2. Every straight line , CA , CE , CD , drawn from the ...Page 110

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**circle**, and circumscribed about one . Let ABCDE & c . be a regular polygon describe a**circle**through the three points A , B , C , the centre being O , and OP the perpendicular let fall from it , to the middle point of BC : draw AO and ...Page 121

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**circle**is equal to the product of its circumference by half the radius . Let ACDE be a**circle**whose centre is O and radius OA : then will F area OA = 10A × circ . OA . For , inscribe in the**circle**any E regular polygon , and draw OF ...### Contents

Ratios and Proportions | 34 |

The Circle and the Measurement of Angles | 41 |

Problems relating to the First and Third Books | 57 |

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### Common terms and phrases

adjacent adjacent angles altitude angle ACB angle BAC ar.-comp base multiplied bisect Book VII centre chord circ circumference circumscribed common cone consequently 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 M.
M. Sine number of sides opposite parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN polyedron polygon ABCDE PROBLEM Prop proportional PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon right angled triangle S-ABC Scholium secant segment similar slant height solid angle solid described sphere spherical polygon spherical triangle square described straight line Tang tangent THEOREM triangle ABC triangular prism vertex