Mathematics for Carpenters and Builders - Carpenter's and Builder's Math, Plans, and Specifications - page 153

A

C B

D
Figure 5-24 To erect a perpendicular to a straight line from
any point outside the line, second method.

C D

A B

Figure 5-25 To draw a line parallel to a given line through a

given point.

Figure 5-26 To draw a line
parallel to a given line through
a given point, second method.

A D

E F

EA , and lay off FD equal to EA . Draw the parallel line through the
points AD .

Problem 6
To divide a line into a number of equal parts.