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Side 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 ... angles which this one ( the mean ) makes with the other two ( the extremes ) are said to be adjacent angles : and ...
... angles are equal , and each is then said to be a straight angle . An angle is named by a single letter at its vertex ... angles which this one ( the mean ) makes with the other two ( the extremes ) are said to be adjacent angles : and ...
Side 12
... angle to angle . Perimeter . Teρl μeтρéw , to measure round . Triangle . Tres , angulus , with three angles . Quadrilateral . Quadra ( quater ) , latus , with four sides . Equilateral . Equus , latus , having equal sides . Pentagon ...
... angle to angle . Perimeter . Teρl μeтρéw , to measure round . Triangle . Tres , angulus , with three angles . Quadrilateral . Quadra ( quater ) , latus , with four sides . Equilateral . Equus , latus , having equal sides . Pentagon ...
Side 13
... equal to , the angle QRS . ( Ax . 1. ) But by Def . 14 , the angle ABC is ... angles are equal . COR . 3. The supplements of equal angles are equal . THEOREM 2 . If a straight line ... angles made by one SECT . I. ] 13 ANGLES AT A POINT .
... equal to , the angle QRS . ( Ax . 1. ) But by Def . 14 , the angle ABC is ... angles are equal . COR . 3. The supplements of equal angles are equal . THEOREM 2 . If a straight line ... angles made by one SECT . I. ] 13 ANGLES AT A POINT .
Side 14
... equal to two 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 ...
... equal to two 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 ...
Side 15
... angles AOC and AOD are together equal to two right angles . ( Th . 2. ) Therefore the angles AOC and COB are equal to the angles AOC and AOD . Take away the common angle AOC ; therefore the angle COB is equal to the angle AOD ...
... angles AOC and AOD are together equal to two right angles . ( Th . 2. ) Therefore the angles AOC and COB are equal to the angles AOC and AOD . Take away the common angle AOC ; therefore the angle COB is equal to the angle AOD ...
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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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