02角與形狀03認識直角(選擇01)
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(1).  用三角板的直角比一比,哪一個角是鈍角?  *
20 points
(2).  用三角板的直角比一比,下面的圖形中有幾個銳角? *
20 points
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(3).  用三角板量量看,下面哪一個角不是直角? *
20 points
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(4).  用三角板的直角比一比,下面哪一個角是直角?  *
20 points
(5).  下圖是本壘板,用三角板比一比,在這個圖形中可以找出幾個直角? *
20 points
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