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acres adjustment applied base base line calculated called centre chain chord circle circumference column compass contained continued correct cross cube curve cutting decimals describe diameter difference direct distance divided division draw the line drawn Engineers equal Example feet fence field figure fixed flag four give given ground half height inches intersecting land length less logarithm manner mark measure method middle minutes move Multiply natural needle object observed offsets opposite parallel perpendicular Plate plotted poles practice Problem proof proportion prove quantity quotient radius reduced right angles roads root Rule scale screw segment shown side sine solid square station straight surface survey surveyor TABLE taken tangent telescope theodolite third triangle whole yards
Page 102 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.