Casio fx-CG50 User Manual page 559

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Determining the Relationship of Straight Lines or Planes (Not available
with the fx-CG50 AU, fx-CG20 AU)
You can determine the combinations below for the relationship of two 3D graphs.
• Line-line ... Intersect/right-angle intersect/parallel/skew relation/same line
• Line-plane ... Intersect/perpendicular intersect/parallel/line on a parallel plane
• Plane-plane ... Intersect/perpendicular intersect/parallel/same plane
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To determine line-plane relationship
1. Use the Line template and Plane template to register the straight line and plane functions
below.
Straight line:
→ →
r r
= =
Plane:
2. Press 6(DRAW) to draw the 3D graph.
3. Press !5(G-SOLVE)3(RELATION).
• This displays the line-plane relationship.
4. To delete the relationship display, press J.
• When there are three straight lines or planes, you can change how they are combined by
pressing 1(Next)/2(Back).
• To determine relationship, you must use the Line template or Plane template to draw two or
more 3D graphs.
−1 −1 1 1
→ →
+ t + t
r r = =
−2 −2 1 1
1 1 0 0
1 1 1 1
+ s + s + t + t
2 2 1 1
0 0 0 0
0 0
1 1
1 1
16-19