Level 208
Level 209

gon


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gon
gon。 (GK gonos)=angle 角
goniometer
[gon;-io-;-meter n.]。 n.测角计,测向计
trigon
[tri-;gon]。 n.三角形
pentagon
[penta-;gon]。 n.五角形
isogon
[iso-;gon]。 n.等角多边形
Level 210