<?xml version="1.0" encoding="utf-8"?>
<CaR>
<Construction>
<Window x="8.799999999999999" y="6.3999999999999995" w="8.0"/>
<Objects>
<Point name="A" n="1" showname="true" xcoffset="-0.309523809523812" ycoffset="-0.10476190476190528" keepclose="true" bold="true" large="true" x="10.100000000000001" actx="10.100000000000001" y="6.2" acty="6.2" fixed="true">Point at &quot;10.100000000000001&quot;, &quot;6.2&quot;</Point>
<Point name="P3" n="4" hidden="super" bold="true" large="true" x="12.609523809523813" y="3.123809523809525">Point at 12.61, 3.12</Point>
<Text name="Text1" n="36" bold="true" large="true" x="1.6761904761904753" y="11.104761904761904">圖中A點是圓心。
移動P點使綠色部分為紅色部分的兩倍。</Text>
<Expression name="E1" n="37" hidden="super" showname="true" showvalue="true" x="1.6400000000000001" y="10.0" value="2*pi/3" prompt="2pi/3">Expression &quot;2*pi/3&quot; at 1.6, 10.0</Expression>
<Text name="Text2" n="40" hidden="super" bold="true" large="true" x="1.8666666666666658" y="4.723809523809523">Target=209</Text>
<Circle name="c2" n="5" hidden="true" bold="true" large="true" through="P3" midpoint="A" acute="true">Circle around A through P3</Circle>
<PointOn name="P" n="6" color="2" type="thick" showname="true" bold="true" large="true" on="c2" alpha="-0.34031412977261133" x="13.842291168673352" y="4.874890794975246" shape="circle">Point on c2</PointOn>
<PointOn name="P8" n="9" hidden="super" bold="true" large="true" on="c2" alpha="0.3587706702705722" x="13.817198249248547" y="7.593949343468204">Point on c2</PointOn>
<Line name="l2" n="10" hidden="super" bold="true" large="true" from="A" to="P8">Line through A and P8</Line>
<Circle name="c6" n="26" color="1" background="true" bold="true" large="true" through="P" midpoint="A" filled="true" start="I4" end="P">Circle around A through P</Circle>
<Circle name="c10" n="35" color="5" background="true" bold="true" large="true" through="P" midpoint="A" filled="true" start="P" end="I4">Circle around A through P</Circle>
<Plumb name="p2" n="16" hidden="super" point="P" line="l2" valid="true">Perpendicular line through P to l2</Plumb>
<Intersection name="I3" n="17" hidden="super" first="p2" second="l2">Intersection between p2 and l2</Intersection>
<Circle name="c4" n="18" hidden="super" through="P" midpoint="I3" acute="true">Circle around I3 through P</Circle>
<Intersection name="I4" n="19" first="p2" second="c4" awayfrom="P" which="second">Intersection between p2 and c4</Intersection>
<Angle name="t" n="32" showvalue="true" xcoffset="1.1047619047619044" ycoffset="0.1999999999999993" keepclose="true" unit="°" bold="true" large="true" first="P" root="A" second="I4">Angle P - A - I4</Angle>
<Expression name="E3" n="39" showname="true" showvalue="true" x="1.695238095238094" y="9.428571428571429" value="round(100*rad(t))" prompt="答案1">Expression &quot;round(100*rad(t))&quot; at 1.7, 9.4</Expression>
</Objects>
</Construction>
</CaR>
