Lessons on Form: Or, An Introduction to Geometry, as Given in a Pestalozzian School, Cheam, SurreyTaylor and Walton, 1837 - 215 sider |
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Side viii
... less of mere mechanical committing to memory , of mere otiose admission and comprehension of demonstrations ready- made , and proportionably more of independent judg- ment and original reasoning . They not only learn Mathematics , but ...
... less of mere mechanical committing to memory , of mere otiose admission and comprehension of demonstrations ready- made , and proportionably more of independent judg- ment and original reasoning . They not only learn Mathematics , but ...
Side 15
... less . M. — An angle which is greater than a right angle is called obtuse ( from the Latin obtusus , blunted ) angle ; the angle which is less than a right angle is called acute ( from the Latin acutus , pointed ) angle . - De- scribe ...
... less . M. — An angle which is greater than a right angle is called obtuse ( from the Latin obtusus , blunted ) angle ; the angle which is less than a right angle is called acute ( from the Latin acutus , pointed ) angle . - De- scribe ...
Side 17
... less than a right angle is called an acute angle . 6. — A quadrilateral figure which has equal sides , and its angles right angles , is called a square . 7. A quadrilateral figure which has equal sides and two pairs of equal opposite ...
... less than a right angle is called an acute angle . 6. — A quadrilateral figure which has equal sides , and its angles right angles , is called a square . 7. A quadrilateral figure which has equal sides and two pairs of equal opposite ...
Side 40
... less than a right angle — it is an acute angle . a d M. - How may you ascertain that the angle a b c is not a right angle ? P. - By comparing it with its adjacent angle a b d ; if the angle a b c is not equal to its adjacent angle a b d ...
... less than a right angle — it is an acute angle . a d M. - How may you ascertain that the angle a b c is not a right angle ? P. - By comparing it with its adjacent angle a b d ; if the angle a b c is not equal to its adjacent angle a b d ...
Side 41
... less than a right angle ? P. - By the same angle a b e . M. - If , then , the two adjacent angles be not right angles , what may be said of the obtuse and the acute angle when compared with one right angle ? P. - The obtuse angle is as ...
... less than a right angle ? P. - By the same angle a b e . M. - If , then , the two adjacent angles be not right angles , what may be said of the obtuse and the acute angle when compared with one right angle ? P. - The obtuse angle is as ...
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Lessons on Form: Or, An Introduction to Geometry, as Given in a Pestalozzian ... Charles Reiner Uten tilgangsbegrensning - 1837 |
Lessons on Form: Or, An Introduction to Geometry, as Given in a Pestalozzian ... Charles Reiner Uten tilgangsbegrensning - 1837 |
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.
Side 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...
Side 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.
Side 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.