Geodaesia : or, The art of surveying and measuring land made easy (1768)
Love, John, fl. 1688, Clark, Samuel · London : Printed for J. Rivington · leaf 33
An angle is the meeting of two lines in a point \provided the two lines fo meeting do not make oneftrait line, as the. line A B, an<J the line A C, meet-ing together in the point A, form the angle BAG. Of io Geometrical Definitions. … Of right-lined angles there are three forts, viz.right-angled, acute, and obtufe. When a line falleth perpendicularly upon anotherline, it maketh two right angles. v M C \ B EXAMPLE. Let CAB be a right line, DA a line perpendi-cular to it, that is to fay, neither leaning towardsB nor C, but exactly…
Surveying
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