<?xml version="1.0" encoding="utf-8"?>
<CaR>
<Construction>
<Window x="8.799999999999999" y="6.3999999999999995" w="8.0"/>
<Objects>
<Point name="P1" n="1" hidden="super" bold="true" large="true" x="9.5" actx="9.5" y="6.5" acty="6.5" fixed="true">Point at &quot;9.5&quot;, &quot;6.5&quot;</Point>
<Point name="P6" n="10" hidden="super" bold="true" large="true" x="12" actx="12.0" y="6.5" acty="6.5" fixed="true">Point at &quot;12&quot;, &quot;6.5&quot;</Point>
<Text name="Text1" n="23" bold="true" large="true" x="2.057142857142856" y="10.952380952380953">移動P點使這三角形的面積為最大。</Text>
<Text name="Text2" n="35" hidden="super" bold="true" large="true" x="2.304761904761904" y="4.038095238095238">Target=354</Text>
<Circle name="c" n="4" hidden="super" bold="true" large="true" fixed="4.5" midpoint="P1" acute="true">Circle around P1 with radius 4.5</Circle>
<Angle name="a2" n="12" hidden="super" unit="°" bold="true" large="true" first="P6" root="P1" fixed="30" acute="true">Angle P6 - P1 with size 30</Angle>
<Intersection name="I7" n="13" bold="true" large="true" first="a2" second="c" which="first">Intersection between a2 and c</Intersection>
<PointOn name="P" n="21" color="2" type="thick" showname="true" xcoffset="-0.24770037808946999" ycoffset="0.06052717989321987" keepclose="true" bold="true" large="true" on="c" alpha="-2.9493180918045714" x="5.082925442002121" y="5.640085847838381" shape="circle">Point on c</PointOn>
<Ray name="r2" n="18" hidden="super" from="I7" to="P1">Ray from I7 pointing to P1</Ray>
<Circle name="c4" n="19" hidden="super" through="I7" midpoint="P1" acute="true">Circle around P1 through I7</Circle>
<Angle name="a" n="33" hidden="super" showname="true" xcoffset="0.1380952380952376" ycoffset="0.909523809523809" keepclose="true" unit="°" bold="true" large="true" first="P" root="P1" second="I7" acute="true">Angle P - P1 - I7</Angle>
<Intersection name="I10" n="20" first="r2" second="c4" awayfrom="I7" which="first">Intersection between r2 and c4</Intersection>
<Expression name="E2" n="37" showname="true" showvalue="true" x="2.304761904761904" y="9.295238095238094" value="round(10*a)" prompt="答案2">Expression &quot;round(10*a)&quot; at 2.3, 9.3</Expression>
<Polygon name="poly3" n="22" color="1" background="true" bold="true" large="true" point1="P" point2="I7" point3="I10">Polygon P, I7, I10</Polygon>
<Segment name="s2" n="26" hidden="super" bold="true" large="true" from="I10" to="I7">Line segment from I10 to I7</Segment>
<Plumb name="p2" n="29" hidden="super" bold="true" large="true" point="P" line="s2" valid="true">Perpendicular line through P to s2</Plumb>
<Intersection name="Q" n="30" hidden="super" showname="true" bold="true" large="true" first="s2" second="p2">Intersection between s2 and p2</Intersection>
<Expression name="E1" n="34" showname="true" showvalue="true" x="2.300000000000001" y="9.9" value="round(100*(c-d(P,Q)))+354" prompt="答案1">Expression &quot;round(100*(c-d(P,Q)))+354&quot; at 2.3, 9.9</Expression>
</Objects>
</Construction>
</CaR>
