**PRIN. OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 2**

Step 1.

Construct an arc of radius R.

Use point 0 as the center (view B).

Step 2.

Define points 3 and 4 where the arc intersects lines 0-1 and 0-2 (view B).

Step 3. Using points 3 and 4 as centers, construct two more arcs of radius R as

shown in view B.

Step 4.

Define the intersection of the two arcs as point 5 (view C).

Step 5.

Construct a line 0-5.

Angle 1-0-5 is equal to angle 5-0-2 (view D).

c. * Divide a Line*. In the following subparagraphs, we will discuss the procedures

for dividing a line into any number of equal parts and dividing a line into

proportional parts.

(1) *Divide a Line into Equal Parts*, (figure 25, on the following page).

Let's

assume that we have a line 1-2 (view A).

We have to divide this line into five

equal parts. To divide the line perform the following steps:

Step 1.

Construct a line A-X at any angle to line 1-2 (figure 25, view B).

Step 2.

Mark off five equal spaces along line 1-X and construct a line 2-7 (view

C).

**NOTE**

**Any size space may be used as long as they are all equal in**

**length.**

Step 3.

Draw lines 6-F, 5-E, 4-D, and 3-C parallel to line 2-7 (figure 25, view

D).

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