Geometric Construction of the Nuclear Radiation Symbol
2019-11-21 16:59
This GeoGebra example demonstrates the geometric construction of the nuclear radiation symbol. By utilizing core commands such as circles, circular arcs, intersections, segments, rotational transformations, and loci, it accurately constructs the three symmetrical blades and the central circle. This case intuitively presents the geometric properties of circles and rotational symmetry, making it an
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<output a0="loc3"/>
</command>
<element type="locus" label="loc3">
<show object="true" label="false" ev="4"/>
<objColor r="0" g="0" b="0" alpha="1.0"/>
<layer val="3"/>
<labelMode val="0"/>
<auxiliary val="false"/>
<lineStyle thickness="5" type="0" typeHidden="1" opacity="178"/>
</element>
<expression label ="h" exp="y = 0" type="line"/>
<element type="line" label="h">
<show object="false" label="false" ev="4"/>
<objColor r="0" g="0" b="0" alpha="0.0"/>
<layer val="4"/>
<labelMode val="0"/>
<animation step="1" speed="1" type="0" playing="false"/>
<coords x="0.0" y="1.0" z="0.0"/>
<lineStyle thickness="5" type="0" typeHidden="1" opacity="178"/>
<eqnStyle style="explicit"/>
</element>
<command name="Point">
<input a0="h"/>
<output a0="B"/>
</command>
<element type="point" label="B">
<show object="true" label="true" ev="4"/>
<condition showObject="a"/>
<objColor r="255" g="0" b="0" alpha="0.0"/>
<layer val="4"/>
<labelMode val="0"/>
<animation step="0.1" speed="1" type="1" playing="false"/>
<coords x="1.2966666666666709" y="-0.0" z="1.0"/>
<pointSize val="5"/>
<pointStyle val="0"/>
</element>
<command name="Point">
<input a0="h"/>
<output a0="E"/>
</command>
<element type="point" label="E">
<show object="true" label="true" ev="4"/>
<condition showObject="a"/>
<objColor r="255" g="0" b="0" alpha="0.0"/>
<layer val="4"/>
<labelMode val="0"/>
<animation step="1" speed="1" type="1" playing="false"/>
<coords x="7.0" y="-0.0" z="1.0"/>
<pointSize val="5"/>
<pointStyle val="0"/>
</element>
<command name="Point">
<input a0="h"/>
<output a0="F"/>
</command>
<element type="point" label="F">
<show object="true" label="true" ev="4"/>
<condition showObject="a"/>
<objColor r="255" g="0" b="0" alpha="0.0"/>
<layer val="4"/>
<labelMode val="0"/>
<animation step="1" speed="1" type="1" playing="false"/>
<coords x="8.0" y="-0.0" z="1.0"/>
<pointSize val="5"/>
<pointStyle val="0"/>
</element>
<element type="boolean" label="a">
<value val="true"/>
<show object="true" label="true"/>
<objColor r="0" g="0" b="0" alpha="0.0"/>
<layer val="0"/>
<labelOffset x="70" y="93"/>
<labelMode val="4"/>
<checkbox fixed="true"/>
<caption val="點"/>
</element>
</construction>
</geogebra>