An Encyclopædia of Architecture: Historical, Theoretical, & PracticalLongmans, Green, and Company, 1881 - 1395 Seiten |
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Seite 270
... tangent ; and the point T is called the point of contact . 3. An angle ( fig . Prop . 33. ABD ) which has its vertex in the circumference of a circle is called an angle in the circle . 4. A part of a circle confined between two radii ...
... tangent ; and the point T is called the point of contact . 3. An angle ( fig . Prop . 33. ABD ) which has its vertex in the circumference of a circle is called an angle in the circle . 4. A part of a circle confined between two radii ...
Seite 271
... tangent to the circle . A D B Let the line AB ( fig . 271. ) pass through the extremity of the radius CT in such a manner that the angles CTA , CTB shall be right angles ; this line AB touches the circumference in only one point T. If ...
... tangent to the circle . A D B Let the line AB ( fig . 271. ) pass through the extremity of the radius CT in such a manner that the angles CTA , CTB shall be right angles ; this line AB touches the circumference in only one point T. If ...
Seite 272
... tangent AB . For all other lines drawn from the point C to the line AB must pass out of the circle to arrive at this ... tangent and chord is measured by half the arc of that chord . T D B Fig . 272 . Let BTA ( fig . 273. ) be a tangent ...
... tangent AB . For all other lines drawn from the point C to the line AB must pass out of the circle to arrive at this ... tangent and chord is measured by half the arc of that chord . T D B Fig . 272 . Let BTA ( fig . 273. ) be a tangent ...
Seite 273
... tangent and chord be parallel to each other , they intercept equal arcs . Let the tangent FG ( fig . 279. ) be parallel to the chord AB ; the arc TA will be equal to the arc TB . Draw the right line TA . Because the lines FG , AB are ...
... tangent and chord be parallel to each other , they intercept equal arcs . Let the tangent FG ( fig . 279. ) be parallel to the chord AB ; the arc TA will be equal to the arc TB . Draw the right line TA . Because the lines FG , AB are ...
Seite 274
... tangent AC and the chord DF are parallel , the inter- cepted arcs GF GD are ( Prop . 47. ) equal . The arc FD is there- fore the difference between the arc GLD and the arc GFD . There- fore the angle CAB , which is mea- sured by half ...
... tangent AC and the chord DF are parallel , the inter- cepted arcs GF GD are ( Prop . 47. ) equal . The arc FD is there- fore the difference between the arc GLD and the arc GFD . There- fore the angle CAB , which is mea- sured by half ...
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