3.填空 (1)73度的角的补角等于____________:锐角的补角一定是__________ (2)105度的角的补角等于____________:钝角的补角一定是__________ (3)90度的角的补角等于____________:直角的补角一定是__________
解题思路： 角的度量
解题过程：
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最终答案：略
