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heptagon
US
・
UK
A1 初級
n.
名詞
七邊形
影片字幕
神祕宇宙學 (Mysterium Cosmographicum)
11:12
equilateral triangle, square, regular pentagon, regular hexagon, regular
heptagon
, regular octagon,
B1 中級
Frieze圖案 - Numberphile (Frieze Patterns - Numberphile)
13:00
I will partition this
heptagon
into triangles. I will triangulate it by its diagonals.
Okay, so now we have five triangles which make this
heptagon
,
B1 中級
