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                <svg viewBox='-17 -7 34 17' 
	<marker id='e' viewBox='-8 -4 8 8' 
					markerWidth='5' markerHeight='5' 
					refX='-7' orient='auto'>
		<path d='M-8 0 0-4V4'/>
	<marker id='e1' viewBox='0 -4 8 8' 
					markerWidth='5' markerHeight='5' 
					refX='7' orient='auto'>
		<path d='M8 0 0-4V4'/>
	<!-- guides -->
	<path d='M6 0
					 A6 6 0 0 1-6 0
					 A3 3 0 0 0 0 0
					 A3 3 0 0 1 6 0
					 M-3 0V7
					 M6 0V9'/>
	<!-- 2nd arc (1st smaller one) -->
	<path id='b' d='M6 0A3 3 0 0 1 0 0'/>
		<path d='M3.2 2.8v.4l-.4-.2'/>
		<text x='3' y='3.7'>1</text>
		<text x='2.5' y='.7'>ρ,0</text>
		<text x='.2' y='.6'>π</text>
		<text x='5.1' y='.7'>0°</text>
		<circle r='.13' cx='3'/>
	<!-- 3rd arc (2nd smaller one) -->
	<path id='c' d='M0 0A3 3 0 0 0-6 0'/>
		<path d='M-2.8-3.2v.4l-.4-.2'/>
		<text x='-3.1' y='-3.3'>2</text>
		<text x='-4' y='-.3'>-ρ,0</text>
		<text x='-6' y='-.1'>-π</text>
		<text x='-1' y='-.1'>0°</text>
		<circle r='.13' cx='-3'/>
	<!-- 1st arc (the big one, want it on top) -->
	<path id='a' d='M-6 0A6 6 0 0 1 6 0'/>
		<path d='M.2-6l-.4-.2v.4'/>
		<text x='-.25' y='-6.3'>0</text>
		<text x='-7.1'>-π</text>
		<text x='6.1'>0°</text>
		<circle r='.13'/>
	<!-- small marker circles -->
	<circle r='.1' cx='-6'/>
	<circle r='.1' cx='6'/>
	<!-- meas lines and text -->
	<g id='m'>
		<path d='M-6 6.4h3'/>
		<text x='-4.7' y='7'>ρ</text>
	<use xlink:href='#m' x='3'/>
	<use xlink:href='#m' x='6' y='-10'/>
	<g id='m1'>
		<path d='M-6 8h6'/>
		<text x='-3.2' y='8.6'>r</text>
		<text x='12' y='-5'>ρ = r/2</text>
	<use xlink:href='#m1' x='6'/>


                svg { 
	stroke: #bbb;
	stroke-width: .08px;
	fill: none;
	font: .65px consolas 

g { stroke: none }
[id] { mix-blend-mode: multiply }
#a { stroke: #e18728 }
#a+* { fill: #e18728 }
#b { stroke: #be4c39 }
#b+* { fill: #be4c39 }
#c { stroke: #9351a6 }
#c+* { fill: #9351a6 }

[id*=m] [d], [r='.1'] {
	fill: #bbb;
	stroke: #555;
	marker-start: url(#e);
	marker-end: url(#e1)

[id*=m], [id*=e] { fill: #555 }
#e1 + * { stroke-width: .05px }