Lessons on Form: Or, An Introduction to Geometry, as Given in a Pestalozzian School, Cheam, SurreyTaylor and Walton, 1837 - 215 páginas |
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Página 16
... lines be lengthened ? P. - They will not cross each other . M. - Such lines are called parallel ( from the Greek Tapa , beside , and aλλnλv , each other ) lines , and hence these figures are called parallelograms ( from the Greek ...
... lines be lengthened ? P. - They will not cross each other . M. - Such lines are called parallel ( from the Greek Tapa , beside , and aλλnλv , each other ) lines , and hence these figures are called parallelograms ( from the Greek ...
Página 36
... lines will never meet . M - Straight lines which , when produced ever so far both ways , never meet , are called parallel lines . Παράλληλος , from παρά , beside , and αλλήλων , each other . What will happen if eƒ and g h be produced ...
... lines will never meet . M - Straight lines which , when produced ever so far both ways , never meet , are called parallel lines . Παράλληλος , from παρά , beside , and αλλήλων , each other . What will happen if eƒ and g h be produced ...
Página 46
... be written on the school - slate and committed to memory . SUBSTANCE OF SECTION I. 1. A line is length without breadth . 2. The extremities of a line are points . 3. Two straight lines may either be parallel or not 46 LESSONS ON FORM , ...
... be written on the school - slate and committed to memory . SUBSTANCE OF SECTION I. 1. A line is length without breadth . 2. The extremities of a line are points . 3. Two straight lines may either be parallel or not 46 LESSONS ON FORM , ...
Página 47
... lines may either be parallel or not . 4. Parallel lines are such , that , if produced both ways ever so far , they do not meet . 5. If non - parallel lines be produced far enough , they meet or intersect each other . 6. If two straight ...
... lines may either be parallel or not . 4. Parallel lines are such , that , if produced both ways ever so far , they do not meet . 5. If non - parallel lines be produced far enough , they meet or intersect each other . 6. If two straight ...
Página 48
... LINES . you M. - Draw three straight lines , and state what observe respecting them , proceeding as you did with two ... parallel , a and the third non - parallel . f . e 6th . All three may be non - par- a b allel . f M. - In the first ...
... LINES . you M. - Draw three straight lines , and state what observe respecting them , proceeding as you did with two ... parallel , a and the third non - parallel . f . e 6th . All three may be non - par- a b allel . f M. - In the first ...
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Términos y frases comunes
a b and c d a c b a c d acute angles adjacent angle alternate angles angle a b c angle contained angles are equal angles equal base called centre chords circumference cut the circle demonstration diameter dodecahedron edges equal angles equal sides equilateral exterior angle greater inscribed interior and opposite isosceles triangle LESSON likewise lines a b lines be drawn M.-Compare M.-Demonstrate M.-Draw M.-Express M.-Hence M.-What M.-When obtuse angle octahedron opposite angles P.-Because P.-The angle parallelogram pentagon perpendicular plane angles plane faces point of contact pupils pyramid quadrilateral figure rectangle contained rhomb right angles semi-circumference similar triangles slates solid angles sphere square straight line joining tangent third side three angles trapezium triangle a b c triangles are equal truth twice the rectangle unequal whole line
Pasajes populares
Página 98 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 134 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side subtending the obtuse angle, is greater than the squares on the sides containing the obtuse angle, by twice the rectangle contained by the side...
Página 137 - In every triangle, the square of the side subtending either of the acute angles is less than the squares of the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle.
Página 219 - A very convenient class-book for junior students in' private schools. It is intended to convey, in clear and precise terms, general notions of all the principal divisions of Physical Science.