Introduction to Linear DrawingCummings, Hilliard,, 1825 - 64 σελίδες |
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Σελίδα 18
... tangent to it . ( fig . 8. ) Tangent comes from a latin word , which means to touch . A tangent is a right line which touches a circle , but does not cut any of it off . If a right line be drawn from the centre of the circle or arc to ...
... tangent to it . ( fig . 8. ) Tangent comes from a latin word , which means to touch . A tangent is a right line which touches a circle , but does not cut any of it off . If a right line be drawn from the centre of the circle or arc to ...
Σελίδα 19
... tangent to a circle from a given point outside . ( fig . 8. ) 20. Draw two tangents to a circle from a given point . ( fig . 12. ) ( 12 ) ( 13 ) Observe that in drawing a tangent to a circle in problem 14 , any part of the circle may be ...
... tangent to a circle from a given point outside . ( fig . 8. ) 20. Draw two tangents to a circle from a given point . ( fig . 12. ) ( 12 ) ( 13 ) Observe that in drawing a tangent to a circle in problem 14 , any part of the circle may be ...
Σελίδα 20
... tangent outside . ( fig . 14. ) Unequal circles are circles of unequal size only . 24. Make two unequal circles tangent inside . ( fig.15 . ) 25. The centres and the point of contact being giv- en , perform problems 23 and 24 . The ...
... tangent outside . ( fig . 14. ) Unequal circles are circles of unequal size only . 24. Make two unequal circles tangent inside . ( fig.15 . ) 25. The centres and the point of contact being giv- en , perform problems 23 and 24 . The ...
Σελίδα 22
... tangent triangle . ( fig . 19. ) Three tangents to a circle are easily made , but the monitor may increase the difficulty by giving directions to the tangent sides . Thus , let two sides be at right angles , obtuse or acute ; let the ...
... tangent triangle . ( fig . 19. ) Three tangents to a circle are easily made , but the monitor may increase the difficulty by giving directions to the tangent sides . Thus , let two sides be at right angles , obtuse or acute ; let the ...
Σελίδα 23
... , as if you wished to inscribe the polygon . Then draw a radius to each point , and six tangents perpendicular to the radii will form the regular polygon required . 37. Inscribe and circumscribe a circle with regular and parallel 23.
... , as if you wished to inscribe the polygon . Then draw a radius to each point , and six tangents perpendicular to the radii will form the regular polygon required . 37. Inscribe and circumscribe a circle with regular and parallel 23.
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Arithmetick axis called circumference circumscribe column comma cone cord CORINTHIAN ORDER cubick feet Cut a circle cylinder decimal Describe a circle diagonal divide DORICK ORDER dotted line draw a perpendicular Draw a right draw an arc Draw an oblique draw right lines ellipse ENTABLATURE equal sides Example fillets find the surface four sides given point graduated semicircle half diameter halves height hexagon horizontal lines hundredths inches long intercolumniation Ionick isoceles triangle length lengthened mark its centre measure Modules monitor Monitorial School Multiply the base obtuse ogee parallel sides parallelogram parallelopiped PEDESTAL plane parallel preceding figures Prob PROBLEM proportions pupil quarter quarter-round radius Raise a perpendicular rectangle regular polygon right angled triangle right line drawn RULE sandths scalene scalene triangle sided polygon sixth class smaller sides solid contents square inches square yards string subtract superficies tenths thousandths three equal torus trapezium triangular prism Tuscan upright