## Plane Geometry: And Supplements |

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Page 99

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**theorem**is obtained when an essential state- ment of the hypothesis of the**theorem**is interchanged with an essential statement of the conclusion . If both the hypothesis and the conclusion consist of single statements , then the ...Page 101

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**theorem**for proving lines parallel . ( b ) State four other**theorems**for proving lines parallel . 3. ( a ) State the fundamental**theorem**about two parallels cut by a transversal . ( b ) State three other**theorems**about angles that are ...Page 113

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**theorem**. If necessary , see the Index . ( 2 ) Draw the figure as accurately as possible , making it gen- eral . For ...**theorem**is stated in the if - then form , the hypothe- sis and conclusion are evident at once . ( b ) If the ...### Contents

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

LinesAnglesPlanes | 11 |

W W | 24 |

Copyright | |

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### 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