Line Segment Graph Tool

Shows a triangle tool within the GraphTool.

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Complete Code

Download file: LineSegmentGraphTool.pg

POD for Macro Files

See Also

PG problem file

Explanation

DOCUMENT();

loadMacros('PGstandard.pl', 'PGML.pl', 'parserGraphTool.pl', 'PGcourse.pl');

Preamble

Load the parserGraphTool.pl macro to be able to use the GraphTool.

$sx1 = random(-8, 8);
$sy1 = random(-8, 8);
do { $sx2 = random(-8, 8); $sy2 = random(-8, 8); }
    until $sx2 != $sx1 || $sy2 != $sy1;

$gt = GraphTool("{segment, solid, ($sx1, $sy1), ($sx2, $sy2)}",)
    ->with(availableTools => [ 'SegmentTool', 'FillTool', 'SolidDashTool' ]);

Setup

The graph tool is created with the correct answer { segment, solid, ($sx1, $sy1), ($sx2, $sy2) }, with unique points ($sx1, $sy1) and ($sx2, $sy2). For a correct answer, the line segment must have the given the endpoints and be solid.

Mulitple line segments can be added to the graph tool, however, if a triangle or quadrilateral is desired, see Triangle Graph Tool and Quadrilateral Graph Tool for more appropriate tools.

BEGIN_PGML
Graph the line segment between the points [`([$sx1], [$sy1])`] and
[`([$sx2], [$sy2])`].

[_]{$gt}
END_PGML

Statement

This asks the student to graph the line segment with the given endpoints. The code [_]{$gt} inserts the graph tool.

BEGIN_PGML_SOLUTION
The correct answer is

[!A graph of the line segment from  ([$sx1], [$sy1]) to ([$sx2],[$sy2])!]{$gt}
END_PGML_SOLUTION

ENDDOCUMENT();

Solution

To show the graph with alternate text we use the PGML image construct [! !]{$gt}, where the alternate text is placed within the [! !].