<?xml version="1.0" encoding="utf-8"?>
<CaR>
<Construction>
<Window x="8.799999999999999" y="6.3999999999999995" w="8.0" showgrid="true"/>
<Objects>
<Point name="P2" n="2" bold="true" large="true" x="6" actx="6.0" y="9" acty="9.0" fixed="true">Point at &quot;6&quot;, &quot;9&quot;</Point>
<Point name="P3" n="3" bold="true" large="true" x="6" actx="6.0" y="2" acty="2.0" fixed="true">Point at &quot;6&quot;, &quot;2&quot;</Point>
<Point name="P4" n="4" bold="true" large="true" x="13" actx="13.0" y="2" acty="2.0" fixed="true">Point at &quot;13&quot;, &quot;2&quot;</Point>
<Point name="P5" n="5" bold="true" large="true" x="13" actx="13.0" y="9" acty="9.0" fixed="true">Point at &quot;13&quot;, &quot;9&quot;</Point>
<Point name="P" n="28" color="2" showname="true" bold="true" large="true" x="11.5" y="3.5" shape="circle">Point at 11.5, 3.5</Point>
<Text name="Text3" n="59" bold="true" large="true" x="1.5" y="11.0">移動P點使綠色的正方形佔紅色正方形的一半面積。</Text>
<Text name="Text2" n="61" hidden="super" bold="true" large="true" x="1.8666666666666658" y="4.380952380952381">Target=899</Text>
<Segment name="s2" n="8" color="5" type="thick" bold="true" large="true" from="P2" to="P3">Line segment from P2 to P3</Segment>
<Segment name="s4" n="12" color="5" type="thick" bold="true" large="true" from="P3" to="P4">Line segment from P3 to P4</Segment>
<Segment name="s6" n="15" color="5" type="thick" bold="true" large="true" from="P4" to="P5">Line segment from P4 to P5</Segment>
<Segment name="s8" n="18" color="5" type="thick" bold="true" large="true" from="P5" to="P2">Line segment from P5 to P2</Segment>
<Segment name="s10" n="21" hidden="super" bold="true" large="true" from="P2" to="P4">Line segment from P2 to P4</Segment>
<Segment name="s12" n="24" hidden="super" bold="true" large="true" from="P5" to="P3">Line segment from P5 to P3</Segment>
<Polygon name="poly5" n="55" color="5" hidden="true" background="true" bold="true" large="true" point1="P4" point2="P3" point3="P2" point4="P5">Polygon P4, P3, P2, P5</Polygon>
<Expression name="E2" n="62" showname="true" showvalue="true" x="1.4857142857142849" y="9.009523809523813" value="round(100*x(P))" prompt="答案2">Expression &quot;round(100*x(P))&quot; at 1.5, 9.0</Expression>
<Expression name="E3" n="63" showname="true" showvalue="true" x="1.4857142857142849" y="8.571428571428571" value="round(100*y(P))" prompt="答案3">Expression &quot;round(100*y(P))&quot; at 1.5, 8.6</Expression>
<Intersection name="I2" n="25" bold="true" large="true" first="s12" second="s10">Intersection between s12 and s10</Intersection>
<Circle name="c2" n="29" hidden="super" bold="true" large="true" through="P" midpoint="I2" acute="true">Circle around I2 through P</Circle>
<Line name="l2" n="32" hidden="super" bold="true" large="true" from="P" to="I2">Line through P and I2</Line>
<Plumb name="p2" n="35" hidden="super" bold="true" large="true" point="I2" line="l2" valid="true">Perpendicular line through I2 to l2</Plumb>
<Intersection name="I5" n="36" bold="true" large="true" first="l2" second="c2" awayfrom="P" which="first">Intersection between l2 and c2</Intersection>
<Intersection name="I9" n="39" bold="true" large="true" first="p2" second="c2" which="first">Intersection between p2 and c2</Intersection>
<Intersection name="I24" n="52" bold="true" large="true" first="p2" second="c2" which="second">Intersection between p2 and c2</Intersection>
<Polygon name="s" n="56" color="1" type="thick" background="true" bold="true" large="true" point1="P" point2="I9" point3="I5" point4="I24">Polygon P, I9, I5, I24</Polygon>
<Expression name="E1" n="60" showname="true" showvalue="true" x="1.5" y="9.5" value="round(10*(s-24.5))+899" prompt="答案1">Expression &quot;round(10*(s-24.5))+899&quot; at 1.5, 9.5</Expression>
</Objects>
</Construction>
</CaR>
