## Euclidian Geometry |

### From inside the book

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Page 7

Francis Cuthbertson. PROPOSITION IV . If two

Francis Cuthbertson. PROPOSITION IV . If two

**angles**of a triangle are equal to one another , sides**opposite**to those**angles**are equal . the B Let ABC be a triangle , having the ABC the ACB , - the side AB . then shall the side AC be For ... Page 8

...

...

**opposite**side of EF to that on which D is , as H. Join HD . ( i ) If HD cuts EF . B ·· EH is≈ED , .. .. L FHD is L ...**ANGLES**AND TRIANGLES . Page 14

Francis Cuthbertson. RIGHT ANGLES . DEFINITION . When one straight line , standing on another straight line , makes the

Francis Cuthbertson. RIGHT ANGLES . DEFINITION . When one straight line , standing on another straight line , makes the

**adjacent angles**equal to one another , each of them is called a right angle ; and the straight line which stands upon ... Page 15

Francis Cuthbertson. COR . If DEF be any angle , the adjacent △ DEK formed by producing one of its arms FE is the adjacent L FEL formed by producing the other arm . K For they are

Francis Cuthbertson. COR . If DEF be any angle , the adjacent △ DEK formed by producing one of its arms FE is the adjacent L FEL formed by producing the other arm . K For they are

**opposite angles**. = .. if an angle one of its adjacent ... Page 19

... opposite sides of it , make the

... opposite sides of it , make the

**adjacent angles**together equal to two right angles , these two straight lines shall be in one and the same straight line . B Let BC , BD drawn from B one extremity of AB make the adjacent s ABC , ABD ...### Other editions - View all

### Common terms and phrases

Algebra base Cambridge centre chord circumference cloth Conic Sections Crown 8vo Describe a circle diagonals diameter divided draw a straight ELEMENTARY TREATISE English equiangular equilateral Euclid Examples Extra fcap fcap GEOMETRY given angle given circle given point given straight line Grammar greater H Let Hence inscribed intersecting isosceles triangle Latin Let ABC line bisecting locus Mathematical meet opposite angles Owens College parallel parallelogram perimeter perpendicular plane polygon PROBLEM produced Professor proportional PROPOSITION ratio rect rectangle rectangle contained rectilineal figure regular polygon respectively revised rhombus right angles Schools Second Edition segment similar Similarly squares on AC straight line drawn straight line joining tangent THEOREM TRIGONOMETRY twice rectangle twice the squares vertex