nonagon
英 ['nɒnəg(ə)n]美 ['nɑnəɡɑn]
n. [数] 九边形
英文词源
nonagon (n.)
"plane figure with nine sides," 1680s, a hybrid from Latin nonus "ninth" (see nones) + ending from pentagon, etc.
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英 ['nɒnəg(ə)n]美 ['nɑnəɡɑn]
n. [数] 九边形
nonagon (n.)
"plane figure with nine sides," 1680s, a hybrid from Latin nonus "ninth" (see nones) + ending from pentagon, etc.