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 11
... unequal ; or the three sides may be unequal . The master desires the pupils to draw such trian- gles upon their slates ; after which , he may describe an equilateral , an isosceles , and a scalene triangle upon the school - slate , and ...
... unequal ; or the three sides may be unequal . The master desires the pupils to draw such trian- gles upon their slates ; after which , he may describe an equilateral , an isosceles , and a scalene triangle upon the school - slate , and ...
Página 13
... unequal side is called its base . 4. A triangle having unequal sides is called a scalene triangle . 5. - The faces of the tetrahedron are equilateral and equiangular triangles . 6. The octahedron is a solid bounded by eight equilateral ...
... unequal side is called its base . 4. A triangle having unequal sides is called a scalene triangle . 5. - The faces of the tetrahedron are equilateral and equiangular triangles . 6. The octahedron is a solid bounded by eight equilateral ...
Página 15
... unequal ; all four may be unequal . M. - Can you describe two quadrilateral figures having equal sides , and yet being different ? P. - Yes : in the one , all the angles may be equal ; in the other , the sides ᄆᄆ may be equal , but ...
... unequal ; all four may be unequal . M. - Can you describe two quadrilateral figures having equal sides , and yet being different ? P. - Yes : in the one , all the angles may be equal ; in the other , the sides ᄆᄆ may be equal , but ...
Página 16
... , or simply rectangle , and the latter merely parallelogram . The other quadrila- teral figures of which three sides only are equal , or of which all four are unequal , are called trapeziums 16 LESSONS ON FORM , BEING.
... , or simply rectangle , and the latter merely parallelogram . The other quadrila- teral figures of which three sides only are equal , or of which all four are unequal , are called trapeziums 16 LESSONS ON FORM , BEING.
Página 17
... unequal , are called trapeziums ( from the Greek тparéžiov , a small table ) . SUBSTANCE OF THE LESSON . 1. The icosahedron is a solid bounded by twenty equilateral and equiangular triangles : there are five plane angles about each of ...
... unequal , are called trapeziums ( from the Greek тparéžiov , a small table ) . SUBSTANCE OF THE LESSON . 1. The icosahedron is a solid bounded by twenty equilateral and equiangular triangles : there are five plane angles about each of ...
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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.