證明圓內接四邊形的海倫公式,若p是周長的一半,S=sqrt((p-a)(p-b)(p-c)(p-d))
所有跟帖:
• 頭一次聽說這一美妙的公式, 證明倒不難 -kde235- ♂ (1546 bytes) () 01/20/2024 postreply 22:01:51
• 好! -wxcfan123- ♂ (0 bytes) () 01/20/2024 postreply 22:54:30
• 頭一次聽說這一美妙的公式, 證明倒不難 -kde235- ♂ (1546 bytes) () 01/20/2024 postreply 22:01:51
• 好! -wxcfan123- ♂ (0 bytes) () 01/20/2024 postreply 22:54:30
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