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2-Point and 3-Point
The next circle option, 2-Point, requires you to specify two points for making the circle. For this, I will use the triangle shown here. Here, AB is 10 units and AC is 8 units in length:
Figure 2.27: A triangle with 10 and 8 unit side lengths
In the following example, I will make a 2-point circle on the AC line of our sample triangle:
- Select the 2-Point option from the Circle flyout.
- Click on the A point, then click on the C point, and you will end up with a circle that looks like the one in the following diagram.
- In this case, the AC line is on the diameter of the circle and the length of the AC line will be equal to the circle's diameter:
Figure 2.28: A 2-point circle on the AC line
The next example, a 3-Point circle, will need three points to make the circle:
- Select the 3-Point circle command from the Circle flyout and then click on the A point, then the B point, and finally, on the C point of our example triangle.
- The circle will be made by connecting all three points of the triangle, as in the following diagram:
Figure 2.29: A 3-point circle on triangle ABC
The next set of options in the Circle flyout will let you make the circle with the tangent and radius as references. We will discuss this next.