## Elements of Geometry and Trigonometry |

### From inside the book

Results 1-3 of 86

Page 11

...

...

**sides**equal ; a scalene triangle , one which has its three**sides**unequal . 16. A right - angled triangle is one which has a right angle . The**side**opposite the right angle is called the hypothenuse . Thus , in the triangle ABC , right ...Page 32

...

...

**sides**and angles are equal . Let ABCD be a parallelogram : then will D AB = DC , AD = BC , A = C , and ADC = ABC . = B For , draw the diagonal BD . The triangles ABD , DBC , have a common**side**BD ; and A since AD , BC , are parallel ...Page 113

...

...

**side**of the regular polygon of fifteen**sides**, or pente- decagon . It is evident also , that the arc CL is the third of CB . Scholium . Any regular polygon being inscribed , if the arcs subtended by its**sides**be severally bisected , the ...### Contents

BOOK | 7 |

Problems relating to the First and Third Books 57 | 57 |

BOOK IV | 68 |

14 other sections not shown

### Other editions - View all

### 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 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 sine slant height solid angle solid described sphere spherical polygon spherical triangle square described straight line TABLE OF LOGARITHMIC tang tangent THEOREM triangle ABC triangular prism vertex