Method III.
97.
To find the Repreſentation of ſeveral Perpen-
diculars equal in Length to ſome one, whoſe Per-
ſpective is already drawn.
diculars equal in Length to ſome one, whoſe Per-
ſpective is already drawn.
Let H I, be the Perſpective of a Perpendicular
11Fig. 52. to the Geometrical or Perſpective Plane. Now
about the accidental Point T, as a Center, and
with the Radius T H, deſcribe the circular Arc
H G, whoſe Chord let be equal to H I, and draw
the indefinite Line TGC, and let a and b, re-
preſent the Feet of the Perpendiculars, whoſe
Repreſentations are requir’d.
11Fig. 52. to the Geometrical or Perſpective Plane. Now
about the accidental Point T, as a Center, and
with the Radius T H, deſcribe the circular Arc
H G, whoſe Chord let be equal to H I, and draw
the indefinite Line TGC, and let a and b, re-
preſent the Feet of the Perpendiculars, whoſe
Repreſentations are requir’d.