# goniom(A) plots an A degree angle (with an automatic scale) or, better:
# draws a quarter of goniometer, plots the angle, displays the coordinates of the
# corresponding point of the circle and the corresponding slope
goniom(45)
goniom(60)
goniom(30)



# The ordinate of the grey point is the same as the slope.

goniom(26.565)
                  

# With gonioM(a), you can choose (by using BF and HF) other scales.
#
# goniome(S) plots the angle that has the slope equal to S
# A 40 m high tower projects a 24 m shade (40/24 = 166.67%):
goniome(40/24)
                

# With gonioMe(a), you can choose (by using BF and HF) other scales.