Key

Result in Plot view (Continued)

 

gSelects the intersection drawing tool. Fol- low the instructions on the screen (or see page 154).

jSelects the line drawing tool. Follow the instructions on the screen (or see page 156).

BSelects the point drawing tool. Follow the instructions on the screen (or see page 153).

rSelects the segment drawing tool. Follow the instructions on the screen (or see page 156).

nSelects the triangle drawing tool. Follow the instructions on the screen (or see page 157).

tUndo.

Symbolic view in detail

Every object—whether a point, segment, line, polygon, or curve—is given a name, and its definition is displayed in Symbolic view (Y). The name is the name for it you see in Plot view, but prefixed by “G”.

Thus a point labeled A in Plot view is given the name GA in Symbolic view.

The G-prefixed name is a variable that can be read by the computer algebra system (CAS). Thus in the CAS you can include such variables in calculations. Note in the illustration above that GC is the name of the variable that represents a circle drawn in Plot view. If you are working in the CAS and wanted to know what the area of that circle is, you could enter area(GC) and press E. (The CAS is explained in chapter 3.)

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Geometry

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Image 152
HP Prime Graphing NW280AAABA manual Symbolic view in detail