PRINCIPLES OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 2
Step 8. Define the intersection of this arc and the circle as point 6 (figure 32,
view C, on the previous page).
Step 9. Using a compass, mark off the distance 4-6 around the circumference of the
circle as shown in view C.
f. Octagon, (figure 33). In this problem we have to draw an octagon D across the
flats. To draw this octagon, perform the following steps:
DRAWING AN OCTAGON.
Draw a circle of diameter D (view A).
Construct four tangent lines as shown in view B.
Step 3. Construct four lines, 45, to the horizontal, tangential to the circle as
shown in view C.
Draw in the octagon (view C).