## Plane Geometry: And Supplements |

### From inside the book

Results 1-3 of 96

Page 68

...

...

**plan**.**Plan**. 1. Prove △ ABE ≦ △ CDF to get BE = DF . 2. Prove AGBE △ GDF to get GB = GD . Write out the proof using only this**plan**. We make the analysis to find a**plan**. 1. What is the fundamental**plan**for proving : ( a ) Two ...Page 97

...

...

**Plan**. Prove 22 is art . 2 . 101. Cor . 4. If two coplanar angles have their sides respectively parallel , they are equal if the corresponding sides extend in the same directions from their vertices , or in the opposite directions ...Page 122

...

...

**Plan**. Draw AC . Prove 21 ADC . A D 3-1 AD , try to prove AB || DC . = 22 by proving ( Proof left to the pupil . ) C 2 4 B ABC 129. If the opposite sides of a quadrilateral are equal , the quadrilateral is a parallelogram . Use the ...### 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