## An Encyclopaedia of Architecture, Historical, Theoretical, and Practical |

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Page 275

Now the

the base BC . Produce BC both ways ; through the point A draw FG parallel to BC

, and raise the two perpendiculars BF , CG . Because the rectangle BFGC and ...

Now the

**surface**of the triangle is equal to half the product of the height AD andthe base BC . Produce BC both ways ; through the point A draw FG parallel to BC

, and raise the two perpendiculars BF , CG . Because the rectangle BFGC and ...

Page 281

The

figures A , a are similar , they are composed of an equal number of

corresponding points ; and since the homologous sides CD , cd are composed of

an equal ...

The

**surface**A is to the**surface**a as the square B is to the square b . Since thefigures A , a are similar , they are composed of an equal number of

corresponding points ; and since the homologous sides CD , cd are composed of

an equal ...

Page 318

PROJECTION OF

lines projected on vertical and horizontal planes may be applied to plane

plane , results ...

PROJECTION OF

**SURFACES**. 1134 . What has been said in respect of rightlines projected on vertical and horizontal planes may be applied to plane

**surfaces**; thus , from the**surface**ABCD ( fig . 463 . ) , parallel to an horizontalplane , results ...

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angle appears arch architect architecture base beam becomes bricks building built called cast cathedral centre century church circle colour columns common considered construction contains course covered curve depth 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 nearly necessary observed obtained original parallel period perpendicular piece placed plane plates 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