2010.03.19 嵌入圓心的三角形 - 拼圖
By Jessica
at 2010-03-19T18:54
at 2010-03-19T18:54
Table of Contents
◆嵌入圓心的三角形
http://tinyurl.com/ylrvs2t
(圖示僅作參考)
如圖,有一個半徑為5的圓。三角形的一角置於圓心。
若陰影面積為20π──
請問:x的角度為何?
a)18°
b)36°
c)45°
d)54°
e)72°
--
http://tinyurl.com/ylrvs2t
(圖示僅作參考)
如圖,有一個半徑為5的圓。三角形的一角置於圓心。
若陰影面積為20π──
請問:x的角度為何?
a)18°
b)36°
c)45°
d)54°
e)72°
--
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