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angle contained angle of 30 assumed axis base centre Chap circle coincides complete cone construction cube curve determine diagonal distance draw a plane draw a straight Draw the plan drawn edge elevation equal evidently faces feet figure given angle given plane given point ground line height hori horizontal plane horizontal trace inches inches long indices intersection join line A B line of level meet parallel to x y perpendicular to x y plane inclined plane of projection plane P Q R plane perpendicular portion position prism Prob PROBLEM produced pyramid radius rays of light required plane respectively resting right angles scale shown side similar situated solid solutions space square straight line straight line parallel surface tion touching triangle turned units vertex vertical plane vertical trace
Pagina 8 - The projection of a point upon a plane is the foot of the perpendicular drawn from the point to the plane. Thus A' is the projection of the point A upon the plane MN.
Pagina 95 - A pyramid having for its base a square of 2-5" side, and its axis 3-25" long, rests with one face on the horizontal plane. Draw its plan, and a sectional elevation on a vertical plane represented by a line bisecting the plan of the axis and making an angle of 60į with it. 6. Draw the plan of a school-room 36
Pagina 49 - Through any point in the first line draw a line parallel to the second ; the plane through these is parallel to the second line. Through the second line draw a plane perpendicular to the fore-named plane cutting the first line in a point. Through this point draw a perpendicular in the second plane to the first, and it will be perpendicular to both lines.
Pagina 74 - Through a given point in a given plane, to draw a straight line...
Pagina 73 - Through a given straight line to draw a plane perpendicular to a given plane . . . .153 flane Geometry is that part of Geometry which treats of plane figures and lines in one plane.
Pagina 47 - Through a given point to draw a straight line which shall make equal angles with two straight lines given in position. Let P be the given point, and BE, CF the lines given in position. Produce BE, CF to meet in A, and bisect the angle BAG by the line c AD.
Pagina 56 - A cylinder is conceived to be generated by the revolution of a rectangle about one of its sides as an axis.
Pagina 30 - Through a given point to draw a straight line perpendicular to a given plane . Let AB be the ground line; EF', EG...
Pagina 97 - ... is perforated longitudinally and transversely by semicircular arches, springing at the same height, -viz., 10 feet 6 inches, and intersecting each other.