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 2
... P. - They are all bounded by a surface . M. ( holding up a sphere and a prism . ) — In what does the surface of one of these objects chiefly differ from the surface of the other ? P. — The one is composed of several surfaces , and the ...
... P. - They are all bounded by a surface . M. ( holding up a sphere and a prism . ) — In what does the surface of one of these objects chiefly differ from the surface of the other ? P. — The one is composed of several surfaces , and the ...
Página 3
... you hold a surface in your hand without holding the object itself ? P.-No. On this question being asked , one of the pupils said , a shadow is a surface existing without a concomitant solid . The master will of course convince his ...
... you hold a surface in your hand without holding the object itself ? P.-No. On this question being asked , one of the pupils said , a shadow is a surface existing without a concomitant solid . The master will of course convince his ...
Página 4
... you have mentioned . What do you observe ? P. - They are all straight lines . M. - And the boundaries of the other group ? P. - Curved lines and straight lines , or only curved lines . The substance of the lesson is then written on the ...
... you have mentioned . What do you observe ? P. - They are all straight lines . M. - And the boundaries of the other group ? P. - Curved lines and straight lines , or only curved lines . The substance of the lesson is then written on the ...
Página 10
... P.- Six edges ; because there are six twos in twelve . M. - Now take the solid , examine it , and see whe- ther it ... they have made is strictly true . P. - Three angles . M. - These angles are called plane angles ; can you tell why ? P ...
... P.- Six edges ; because there are six twos in twelve . M. - Now take the solid , examine it , and see whe- ther it ... they have made is strictly true . P. - Three angles . M. - These angles are called plane angles ; can you tell why ? P ...
Página 11
... you observe ? 1 P. — They are of the same length ; they are equal . M. - How will you call a triangle which has three equal sides ? P. - An equal - sided triangle . M. - Call it an equi - lateral triangle ( from the Latin æquus , equal ...
... you observe ? 1 P. — They are of the same length ; they are equal . M. - How will you call a triangle which has three equal sides ? P. - An equal - sided triangle . M. - Call it an equi - lateral triangle ( from the Latin æquus , equal ...
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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.