<?xml version="1.0" encoding="utf-8"?>
<CaR>
<Construction>
<Window x="8.799999999999999" y="6.3999999999999995" w="8.0" showgrid="true"/>
<Objects>
<Point name="P1" n="1" hidden="super" bold="true" large="true" x="7" actx="7.0" y="6" acty="6.0" fixed="true">Point at &quot;7&quot;, &quot;6&quot;</Point>
<Point name="P3" n="4" hidden="super" bold="true" large="true" x="9" actx="9.0" y="6" acty="6.0" fixed="true">Point at &quot;9&quot;, &quot;6&quot;</Point>
<Text name="Text1" n="74" bold="true" large="true" x="1.6571428571428561" y="10.780952380952385">移動P點使這菱形的面積為12。</Text>
<Text name="Text2" n="76" hidden="super" bold="true" large="true" x="1.5" y="4.0">Target=1124</Text>
<Line name="l2" n="5" hidden="super" bold="true" large="true" from="P1" to="P3">Line through P1 and P3</Line>
<Plumb name="p2" n="8" hidden="super" bold="true" large="true" point="P3" line="l2" valid="true">Perpendicular line through P3 to l2</Plumb>
<Intersection name="I6" n="17" hidden="super" bold="true" large="true" first="p2" second="l2">Intersection between p2 and l2</Intersection>
<Circle name="c4" n="20" hidden="super" bold="true" large="true" fixed="4.5" midpoint="I6" acute="true">Circle around I6 with radius 4.5</Circle>
<Circle name="c9" n="68" hidden="super" bold="true" large="true" fixed="1.4000000000000001" midpoint="I6" acute="true">Circle around I6 with radius 1.4000000000000001</Circle>
<Circle name="c13" n="72" hidden="super" bold="true" large="true" fixed="4.28" midpoint="I6" acute="true">Circle around I6 with radius 4.28</Circle>
<Intersection name="I10" n="23" hidden="super" bold="true" large="true" first="l2" second="c4" which="second">Intersection between l2 and c4</Intersection>
<Segment name="s4" n="24" hidden="super" bold="true" large="true" from="I6" to="I10">Line segment from I6 to I10</Segment>
<PointOn name="P" n="25" color="1" showname="true" xcoffset="-0.23333333333333428" ycoffset="-0.20952380952381056" keepclose="true" bold="true" large="true" on="s4" alpha="0.5142857142857145" x="6.685714285714285" y="6.0" shape="circle">Point on s4</PointOn>
<Intersection name="I15" n="69" hidden="super" bold="true" large="true" first="s4" second="c9" which="first">Intersection between s4 and c9</Intersection>
<Intersection name="I18" n="73" hidden="super" bold="true" large="true" first="s4" second="c13" which="first">Intersection between s4 and c13</Intersection>
<Circle name="c6" n="28" hidden="super" bold="true" large="true" fixed="s4" midpoint="P" acute="true">Circle around P with radius s4</Circle>
<Plumb name="p4" n="38" hidden="super" point="P" line="p2" valid="true">Perpendicular line through P to p2</Plumb>
<Ray name="r4" n="53" hidden="super" from="P" to="I6">Ray from P pointing to I6</Ray>
<Circle name="c12" n="54" hidden="super" through="P" midpoint="I6" acute="true">Circle around I6 through P</Circle>
<Expression name="E2" n="77" showname="true" showvalue="true" x="1.8285714285714285" y="9.333333333333334" value="round(100*x(P))" prompt="答案2">Expression &quot;round(100*x(P))&quot; at 1.8, 9.3</Expression>
<Intersection name="I13" n="31" bold="true" large="true" first="p2" second="c6" which="first">Intersection between p2 and c6</Intersection>
<Intersection name="I17" n="39" hidden="super" first="p4" second="p2">Intersection between p4 and p2</Intersection>
<Intersection name="I22" n="55" first="r4" second="c12" awayfrom="P" which="first">Intersection between r4 and c12</Intersection>
<Segment name="s6" n="32" bold="true" large="true" from="P" to="I13">Line segment from P to I13</Segment>
<Circle name="c8" n="40" hidden="super" through="P" midpoint="I17" acute="true">Circle around I17 through P</Circle>
<Ray name="r2" n="46" hidden="super" from="I13" to="I6">Ray from I13 pointing to I6</Ray>
<Circle name="c10" n="47" hidden="super" through="I13" midpoint="I6" acute="true">Circle around I6 through I13</Circle>
<Segment name="s12" n="64" bold="true" large="true" from="I22" to="I13">Line segment from I22 to I13</Segment>
<Intersection name="I20" n="48" first="r2" second="c10" awayfrom="I13" which="first">Intersection between r2 and c10</Intersection>
<Segment name="s8" n="58" bold="true" large="true" from="P" to="I20">Line segment from P to I20</Segment>
<Segment name="s10" n="61" bold="true" large="true" from="I20" to="I22">Line segment from I20 to I22</Segment>
<Polygon name="s" n="65" color="1" background="true" xcoffset="-0.26666666666666666" ycoffset="-0.4000000000000001" bold="true" large="true" point1="P" point2="I13" point3="I22" point4="I20">Polygon P, I13, I22, I20</Polygon>
<Expression name="E1" n="75" showname="true" showvalue="true" x="1.8285714285714285" y="9.809523809523812" value="round(100*(s-12))+1124" prompt="答案1">Expression &quot;round(100*(s-12))+1124&quot; at 1.8, 9.8</Expression>
</Objects>
</Construction>
</CaR>
