<?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="5" actx="5.0" y="3" acty="3.0" fixed="true">Point at &quot;5&quot;, &quot;3&quot;</Point>
<Point name="P2" n="2" hidden="super" bold="true" large="true" x="13" actx="13.0" y="3" acty="3.0" fixed="true">Point at &quot;13&quot;, &quot;3&quot;</Point>
<Point name="P3" n="3" hidden="super" bold="true" large="true" x="5" actx="5.0" y="9" acty="9.0" fixed="true">Point at &quot;5&quot;, &quot;9&quot;</Point>
<Point name="P7" n="13" bold="true" large="true" x="6" actx="6.0" y="4" acty="4.0" fixed="true">Point at &quot;6&quot;, &quot;4&quot;</Point>
<Point name="P13" n="24" type="thick" hidden="super" bold="true" large="true" x="8" actx="8.0" y="4" acty="4.0" fixed="true">Point at &quot;8&quot;, &quot;4&quot;</Point>
<Point name="P14" n="25" type="thick" hidden="super" bold="true" large="true" x="6" actx="6.0" y="6" acty="6.0" fixed="true">Point at &quot;6&quot;, &quot;6&quot;</Point>
<Text name="Text1" n="35" type="thick" bold="true" large="true" x="1.5" y="11.0">圖中有兩個三角形。
移動P點及Q點使黑色三角形的周界是綠色三角形周界的兩倍。</Text>
<Text name="Text2" n="49" hidden="super" bold="true" large="true" x="1.5" y="3.5">Target=976</Text>
<Segment name="s2" n="6" type="thick" bold="true" large="true" from="P3" to="P1">Line segment from P3 to P1</Segment>
<Segment name="s4" n="9" type="thick" bold="true" large="true" from="P1" to="P2">Line segment from P1 to P2</Segment>
<Segment name="s6" n="12" type="thick" bold="true" large="true" from="P2" to="P3">Line segment from P2 to P3</Segment>
<Ray name="r2" n="28" type="thick" hidden="super" bold="true" large="true" from="P7" to="P14">Ray from P7 pointing to P14</Ray>
<Ray name="r4" n="31" type="thick" hidden="super" bold="true" large="true" from="P7" to="P13">Ray from P7 pointing to P13</Ray>
<PointOn name="P" n="32" color="5" showname="true" xcoffset="-0.4190476190476202" ycoffset="0.4142857142857137" keepclose="true" bold="true" large="true" on="r2" alpha="3.5" x="6.0" y="7.5" shape="circle">Point on r2</PointOn>
<PointOn name="Q" n="33" color="5" showname="true" bold="true" large="true" on="r4" alpha="2.4952380952380935" x="8.495238095238093" y="4.0" shape="circle">Point on r4</PointOn>
<Segment name="side1" n="39" color="1" type="thick" xcoffset="0.5597826086956521" ycoffset="0.02717391304347868" keepclose="true" bold="true" large="true" from="P" to="P7">Line segment from P to P7</Segment>
<Segment name="side2" n="42" color="1" type="thick" xcoffset="0.4274809160305342" ycoffset="0.10687022900763382" keepclose="true" bold="true" large="true" from="P7" to="Q">Line segment from P7 to Q</Segment>
<Segment name="side3" n="45" color="1" type="thick" xcoffset="0.43134641394045126" ycoffset="0.03536076209890823" keepclose="true" bold="true" large="true" from="Q" to="P">Line segment from Q to P</Segment>
<Polygon name="poly4" n="46" color="1" background="true" bold="true" large="true" point1="P7" point2="P" point3="Q">Polygon P7, P, Q</Polygon>
<Expression name="E3" n="50" showname="true" showvalue="true" x="1.542857142857142" y="8.228571428571428" value="round(100*y(P))" prompt="答案2">Expression &quot;round(100*y(P))&quot; at 1.5, 8.2</Expression>
<Expression name="E4" n="51" showname="true" showvalue="true" x="1.523809523809523" y="7.7714285714285705" value="round(100*x(Q))" prompt="答案3">Expression &quot;round(100*x(Q))&quot; at 1.5, 7.8</Expression>
<Expression name="p" n="47" hidden="super" showname="true" showvalue="true" x="1.5" y="9.5" value="side1+side2+side3" prompt="p">Expression &quot;side1+side2+side3&quot; at 1.5, 9.5</Expression>
<Expression name="E2" n="48" showname="true" showvalue="true" x="1.561904761904761" y="8.609523809523811" value="round(100*(p-12))+976" prompt="答案1">Expression &quot;round(100*(p-12))+976&quot; at 1.6, 8.6</Expression>
</Objects>
</Construction>
</CaR>
