Casio CLASSWIZ CG Software User's Manual page 165

A parallel line
A single point
elements: line segment, straight line, ray, vector, side
of a polygon
A tangent
A single circle, semi circle, arc, or function graph
*1 The vertices of a polygon, the center point of a circle, or any other point that constitutes a figure.
*2 If two line segments with no points of intersection are selected, an intersection point is created at the location
where the two line segments eventually intersect when extended.
*3 A symbol (>) indicating parallelism appears or both one ends of the selected line segment, line, ray, or
polygon and the drawn parallel line.
*4 In the case of drawing a tangent, you don't need to select a figure first. After selecting T > [Construct] >
[Tangent], move the pointer to a point on the figure to which you want to draw a tangent line, and then press
O.
Attaching an Angle Measurement to a Figure
You can select two line segments or two sides of a polygon and attach an angle value to them.
Example: To select two sides of a polygon and append an angle value
1. Draw a triangle and select two of its sides.
2. Select T > [Construct] > [Attached Angle].
• This attaches the angle measurement to the figure.
• While the "Select Display Position" message is displayed, you can use the cursor keys to specify which
angle measurement is displayed for the two selected sides.
3. To determine the display location of an angle measurement, press O.
Using the Transformations Menu
You can use the Transformations menu to perform various transform operations, such as object reflection,
object rotation, etc.
Reflecting an Object
You can specify a line segment, line, ray, one side of a polygon, or the x -axis or y -axis as the axis of reflection.
*1
plus one of the following geometric
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[Parallel Line]
[Tangent]
*4
*4
*3