uTo construct a parallel

1.Draw a line segment, plot a point, and select the line and point.

2.Perform the following operation: 4(Construct) – 6:Parallel.

This will draw an infinite line that is parallel to the selected line segment and passes through the selected point. Marks () appear on both the line segment and the infinite line to indicate they are parallel.

Note

You can perform a parallel construct operation while any of the following combination objects is selected.

A single line segment and a single point, a single line and a single point, a single ray and a single point, a single vector and a single point

One side of a polygon and a single point

uTo construct a tangent

1.Draw a circle.

2.Perform the following operation: 4(Construct) – 7:Tangent.

This will cause the message “Select Curve” to appear.

3.Move the pointer close to the location on the circle where you want to construct the tangent.

Move the pointer towards the circle until marks appear on it.

4.Press w.

This will draw a line that is tangent to the circle at the location you selected with the pointer.

Note

You can perform the tangent construct operation while a circle, semi circle, arc, or function graph is selected.

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