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angle rib applied arch axis backing base beam bend bevel body bottom break CARPENTRY centre chord circle circular circumference common compass continue corresponding crown curve cylinder DEMONSTRATION depth describe diameter directed distance divide divisions dome dotted draw lines drawn edge ellipsis equal EXAMPLE extremities face falling fame manner figure foot front GEOMETRY give given groin half height inches intersect join length meet method middle mould Note opening ordinates parallel perpendicular piece piece of timber plane PLATE points polygon PRACTICAL pricked proportion purline quarter radius rail rake right angles roof round rule segment semicircle shown side sirst soffit square staircase stand steps straight strength suppose sweep THEORY AND PRACTICE thickness traced triangle true wall width
Page xiv - A Right angle is that which is made by one line perpendicular to another. Or when the angles on each side are equal to one another, they are right angles.
Page xvi - A. 44. A diameter of a circle is a right line drawn through the centre, terminating on both sides of the circumference, as с d, at B.