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It is a curve described by the polar equation: r= 1+2sin(φ/2), (note the 2 in front of sine) named after and English mathematician T. J. Freeth (1819-1904) which first appeared in a paper he published in the London Mathematical Society in 1879.
It is considered an extention of Freeths strophoid which is generalized by the equation:
r= a[1+bsin(φ/2)]
See also information at: http://mathworld.wolfram.com/FreethsNephroid.HTML
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∙ 12y ago
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How many lines of symmetry does a nephroid have?
A nephroid has 2 lines of symmetry.
When was James Freeth born?
James Freeth was born in 1786.
When did Andrew Freeth die?
Andrew Freeth died in 1986.
When was Andrew Freeth born?
Andrew Freeth was born in 1912.
When was Ben Freeth born?
Ben Freeth was born in 1971.
When was Evelyn Freeth born?
Evelyn Freeth was born in 1846.
When did Evelyn Freeth die?
Evelyn Freeth died in 1911.
When did Denzil Freeth die?
Denzil Freeth died in 2010.
When was Denzil Freeth born?
Denzil Freeth was born in 1924.
When was George Freeth born?
George Freeth was born in 1883.
When did George Freeth die?
George Freeth died in 1919.
When did Rodger Freeth die?
Rodger Freeth died in 1993.
