250度是钝角吗

2025-04-06 15:10:09
推荐回答(3个)
回答1:

250度不是钝角

钝角:大于直角(90°)小于平角(180°)的角叫做钝角。

钝角是由两条射线构成的,钝角是劣角的一种,钝角一定是第二象限角,第二象限角不一定是钝角。



钝角的变化情况:

当角度在90°~180°间变化时,正弦值随着角度的增大(或减小)而减小(或增大) ,余弦值随着角度的增大(或减小)而减小(或增大)。

正切值随着角度的增大(或减小)而增大(或减小) ,余切值随着角度的增大(或减小)而减小(或增大);正割值随着角度的增大(或减小)而增大(或减小),余割值随着角度的增大(或减小)而增大(或减小)。

回答2:

锐角:0°<锐角<90° (注意没有等号) 钝角:90°<钝角<180° (注意没有等号) 在高中教学里,角的知识有了扩充,有了负角,象限角,角的弧度制等等 不能说“小于90°的角就是锐角”,因为“0°<锐角<90°,小于90°的角 包括锐角,0°,负角” 还有。

回答3:

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