## Plane Geometry: And Supplements |

### From inside the book

Results 1-3 of 22

Page 92

...

...

**exterior angle**of ABC is formed , as ex- terior angle DCA of △ ABC . Two such an- gles can be formed at each vertex . ∠ A and ∠B of △ ABC are the nonadjacent interior angles associated with exterior ∠DCA . A B C D 1. By means of ...Page 110

... angles of the triangle ? ( b ) How large is the

... angles of the triangle ? ( b ) How large is the

**exterior angle**at each of the other two vertices ? F C 3 A 1 D 2 B E E A B D C 5. What is the sum of the interior angles of the above pentagon ? Suggestion . Draw all the diagonals from ...Page 392

... angle formed by the bisectors of two angles of a triangle always is an obtuse angle . 60. Prove that the

... angle formed by the bisectors of two angles of a triangle always is an obtuse angle . 60. Prove that the

**exterior angle**at the base of an isosceles triangle equals the angle between the bisectors of the base angles . 61. In ∆ABC ...### Contents

g The optional units from analytic geometry are included for three | 1 |

LinesAnglesPlanes | 11 |

W W | 24 |

Copyright | |

13 other sections not shown

### Other editions - View all

### Common terms and phrases

ABCD acute angle adjoining figure altitude angle formed angles are equal apothem bisector bisects central angle chord conclusion congruent Construct converse coplanar corresponding sides diagonals diameter dihedral Draw drawn equal circles equidistant equilateral triangle exercises extended exterior angle figure for Ex Find frustum geometry given hypotenuse Hypothesis Informal proof inscribed intersect isosceles trapezoid isosceles triangle kind of angle lateral area length locus of points mean proportional measure meeting mid-point opposite sides parallel parallelogram perimeter perpendicular perpendicular-bisector Plan plane plane geometry Post postulate prism Prove pyramid quadrilateral radii radius ratio rectangle regular polygon rhombus right angle right circular right triangle secant segment similar sphere square Statements straight line Suggestion tangent theorem trapezoid trihedral angle vertex vertical angles Нур