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acres added adjustment applied base calculated called centre chord circle circumference column compass contained continued correct cross cube curve cutting decimals describe diameter difference 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 object observed offsets operation opposite parallel pencil perpendicular Plate plotted poles practice Problem proportion prove quantity quotient radius reduced right angles roads root Rule scale screw sector segment shown side sine slopes solid square staff station straight surface survey TABLE taken tangent telescope theodolite third triangle whole width yards
Page 106 - 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.