shown in figure 14-7, which you should refer to as you

read this section.

1. Draw lines between points A, B, and C, and

bisect these lines (view A).

2. The point where the bisecting lines intersect

each other (point D) is the center of the circle.

Place one point of the dividers at this point and

the other point at one of the other three lettered

points.

3. Draw the circle as shown in view B. The circle

will now pass through all three lettered points.

Figure 14-8 shows the steps you will follow to draw

a perpendicular from the end of a line.

accurate way to divide a line. A more accurate division

1. Pick any point, such as C, above base line AY.

can be made by using dividers. You may divide a line

into any number of equal parts by using the following

2. With the dividers set at a radius of CA, place the

procedure (fig. 14-6):

point at point C. Draw an arc so the arc

intersects line AY at point B. It must extend an

1. Draw a line at an angle from one end of line AB

equal distance on the other side of A.

(view A).

3. Draw a line intersecting the arc through points

2. On this line mark off five equal points with

B and C. Label this point D.

dividers (view B).

4. Then, draw line DA perpendicular to line AY.

3. Draw a line from the last point at the widest part

of the angle (point C in view C) to the end of the

original line (point A). This line is shown as AC

in view C.

4. From each of the other marked-off points, draw

lines parallel with line AC (view D).

At times, you will need to draw a perpendicular to

a given line from a given point. The steps for drawing

The steps used in drawing a circle through three

given points are given in the following list and are

14-9

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