Class lessons on Euclid1882 |
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Page 8
... angles equal to one another , each of the angles is called a right angle , and the straight line which stands on the other is called a perpendicular to it . ' 11. ' An obtuse angle is that which is greater than a right angle . ' 12. ' An ...
... angles equal to one another , each of the angles is called a right angle , and the straight line which stands on the other is called a perpendicular to it . ' 11. ' An obtuse angle is that which is greater than a right angle . ' 12. ' An ...
Page 10
... angles as well as circles are measured by degrees according to the size of ... equal - sided , figures . Again we have triangle , a three - cornered or ... equal . The perimeter of any figure is the measurement round about it ...
... angles as well as circles are measured by degrees according to the size of ... equal - sided , figures . Again we have triangle , a three - cornered or ... equal . The perimeter of any figure is the measurement round about it ...
Page 11
Marianne Nops. acute angles ; consequently a right - angled triangle has one right angle , an obtuse - angled ... equal sides . ' 25. ' An isosceles triangle is that which has two sides equal . ' 26. ' A scalene triangle is that ...
Marianne Nops. acute angles ; consequently a right - angled triangle has one right angle , an obtuse - angled ... equal sides . ' 25. ' An isosceles triangle is that which has two sides equal . ' 26. ' A scalene triangle is that ...
Page 12
... angles . ' 33. A rhomboid is that which has its opposite sides equal to one another , but all its sides are not equal nor its angles right angles . ' 34. All other four - sided figures besides these are called trapeziums . ' OF ...
... angles . ' 33. A rhomboid is that which has its opposite sides equal to one another , but all its sides are not equal nor its angles right angles . ' 34. All other four - sided figures besides these are called trapeziums . ' OF ...
Page 13
... angles on the same side of it , taken together , less than two right angles , these straight lines being con ... equal to the same thing are equal to one another . ' From this naturally follow axioms 6 and 7 . 6. Things which are ...
... angles on the same side of it , taken together , less than two right angles , these straight lines being con ... equal to the same thing are equal to one another . ' From this naturally follow axioms 6 and 7 . 6. Things which are ...
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Common terms and phrases
&c.-Q.E.D. PROPOSITION ABCD alternate angles angle ABC angle ACB angles are equal angles equal base BC bisected Cheaper Edition circle cons construction Demy 8vo diameter enunciation equal bases equal in area equal sides equal triangles equilateral triangle Euclid exterior Fcap Frontispiece given angle given line given point given straight line given triangle gnomon gram half the line Illustrations interior and opposite interior angles isosceles triangle Join line equal meet opposite angles opposite sides parallelogram perpendicular Poems problem produced proof Prop rectangle contained rhombus right angles right-angled triangle Second Edition sides equal Small crown 8vo square on AC square on half SUMMARY OF PROPOSITION THEOREM Third Edition Translated triangle ABC triangles are equal twice the rect twice the rectangle vertical angle vols Wherefore whole line
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