An Encyclopaedia of Architecture, Historical, Theoretical, and PracticalLongmans, Green, 1876 - 1395 pages |
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Page 272
... half the arc of that chord . T D B Fig . 272 . Let BTA ( fig . 273. ) be a tangent and TD a chord drawn from the point of contact T ; the angle ATD is measured by half the arc TFD , and the angle BTD is measured by half the arc TGD ...
... half the arc of that chord . T D B Fig . 272 . Let BTA ( fig . 273. ) be a tangent and TD a chord drawn from the point of contact T ; the angle ATD is measured by half the arc TFD , and the angle BTD is measured by half the arc TGD ...
Page 273
... half the arc ADB , is greater than the angle at the circumference B , which is measured by half the arc AFC . Again , if the angle C is greater than the angle B , the side AB opposite to the angle C will be greater than the side AC ...
... half the arc ADB , is greater than the angle at the circumference B , which is measured by half the arc AFC . Again , if the angle C is greater than the angle B , the side AB opposite to the angle C will be greater than the side AC ...
Page 298
... half the sum of the opposite angles to the tangent of half their difference . It is to be observed , that in the third term of the proportion the cotangent of half the given angle may be used instead of the tangent of the half sum of ...
... half the sum of the opposite angles to the tangent of half their difference . It is to be observed , that in the third term of the proportion the cotangent of half the given angle may be used instead of the tangent of the half sum of ...
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angle appears arch architect architecture axis base beam becomes bricks building built called cathedral centre century church circle colour columns common considered construction contained course covered curve describe diameter direction divided draw edifices effect employed equal erected examples experiments extremely face feet figure force four front give given greater half horizontal houses inches iron Italy joints length less lime material means mouldings nave nearly necessary observed obtained parallel period perpendicular piece placed plane portion practice principal produced Prop proportion quarries radius remains respect Roman roof round says side similar solid square stone strength style supposed surface temple thickness timber tower triangle upper vault vertical walls weight whereof whole wood