Elementary Geometry ... |
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Página 9
... angles are equal , and each is then said to be a straight angle . An angle is named by a single letter at its vertex ... right angle . OBS . Hence a straight angle is equal to two right angles ; or , a right angle is half a straight ...
... angles are equal , and each is then said to be a straight angle . An angle is named by a single letter at its vertex ... right angle . OBS . Hence a straight angle is equal to two right angles ; or , a right angle is half a straight ...
Página 10
... right angles . Def . 18. A reflex angle is a term sometimes used for a major conjugate angle . Def . 19. When the sum of two angles is a right angle , each is called the complement of the other , or is said to be complementary to the ...
... right angles . Def . 18. A reflex angle is a term sometimes used for a major conjugate angle . Def . 19. When the sum of two angles is a right angle , each is called the complement of the other , or is said to be complementary to the ...
Página 12
... angles . Diagonal . did ywvía , across from angle to angle . Perimeter . Teρl μeтρéw , to measure round . Triangle ... right angles . SECTION I. ANGLES AT A POINT . THEOREM I. All right angles are equal to one another . D B R Part . En ...
... angles . Diagonal . did ywvía , across from angle to angle . Perimeter . Teρl μeтρéw , to measure round . Triangle ... right angles . SECTION I. ANGLES AT A POINT . THEOREM I. All right angles are equal to one another . D B R Part . En ...
Página 13
... right angle ABC is equal to the right angle PRS . Q. E. D. COR . I. At a given point in a given straight line there can be only one perpendicular drawn to that line . COR . 2. The ... angles made by one SECT . I. ] 13 ANGLES AT A POINT .
... right angle ABC is equal to the right angle PRS . Q. E. D. COR . I. At a given point in a given straight line there can be only one perpendicular drawn to that line . COR . 2. The ... angles made by one SECT . I. ] 13 ANGLES AT A POINT .
Página 14
... right angles ; ( Hyp . ) and DBA and DBC , from the figure , make up the angle ABC ; therefore ABC is an angle of two right angles ; and therefore ABC is a straight line . ( Def . 14. ) THEOREM 4 . Q. E. D. If two straight lines cut one ...
... right angles ; ( Hyp . ) and DBA and DBC , from the figure , make up the angle ABC ; therefore ABC is an angle of two right angles ; and therefore ABC is a straight line . ( Def . 14. ) THEOREM 4 . Q. E. D. If two straight lines cut one ...
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Términos y frases comunes
AB² ABCD alternate angles angle ABC angle APB angle BAC angles are equal angles equal bisector centre chord circumference coincide College Constr construct contrapositive Crown 8vo describe a circle diagonals diameter divided draw Edition equal angles equal circles equiangular Euclid exterior angle fcap Find the locus four right angles Geometry given angle given circle given line given point given rectilineal figure given straight line hypotenuse included angle inscribed intersect isosceles triangle less Let AB Let ABC locus magnitudes meet middle point minor arc opposite angles opposite sides parallel parallelogram perpendicular polygon PROBLEM produced Proof Q. E. D. THEOREM quadrilateral radius rectangle contained reflex angle required to prove rhombus right angles segment semicircle Shew square subtend supplementary supplementary angles tangent THEOREM trapezium triangle ABC triangles are equal unequal
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