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 14
... Draw a right angle on your slate . - How many right angles make with two lines ? can you P - Either one right angle , or two , or four . M. - Compare these two angles with each other . P. - They are equal . M. - Are the two angles which ...
... Draw a right angle on your slate . - How many right angles make with two lines ? can you P - Either one right angle , or two , or four . M. - Compare these two angles with each other . P. - They are equal . M. - Are the two angles which ...
Página 16
... Draw two such lines upon your slates , and two others whose distance is not everywhere the same . P.- M. - What happens if the last two lines be length- ened ? P. They will cross each other . M. — And what happens if the first two lines ...
... Draw two such lines upon your slates , and two others whose distance is not everywhere the same . P.- M. - What happens if the last two lines be length- ened ? P. They will cross each other . M. — And what happens if the first two lines ...
Página 26
... drawn from any point of the surface of a sphere , through its centre , to the opposite surface : such a line is called a diameter ( from the Greek dia , through , and μérpov , measure ) .- How many diameters can be drawn in a sphere ? P ...
... drawn from any point of the surface of a sphere , through its centre , to the opposite surface : such a line is called a diameter ( from the Greek dia , through , and μérpov , measure ) .- How many diameters can be drawn in a sphere ? P ...
Página 27
... drawn from any point in the surface of a sphere to its centre : such a straight line is called a radius ( from the Latin radius , a ray ) . How many radii can be drawn in a sphere ? -Compare a radius with a diameter of the same sphere ...
... drawn from any point in the surface of a sphere to its centre : such a straight line is called a radius ( from the Latin radius , a ray ) . How many radii can be drawn in a sphere ? -Compare a radius with a diameter of the same sphere ...
Página 28
... drawn from any point of the sur- face of a sphere to the centre , is called a radius . 4. A diameter of a sphere is ... Draw , on your slates , a figure , which is also bounded by only one curved line , and yet dissimilar to these ...
... drawn from any point of the sur- face of a sphere to the centre , is called a radius . 4. A diameter of a sphere is ... Draw , on your slates , a figure , which is also bounded by only one curved line , and yet dissimilar to these ...
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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.