3.若等腰梯形的两底之差等于一腰长,则它的腰与下底夹角为( )A.30° B.45° C.60° D.75°
问题描述:
3.若等腰梯形的两底之差等于一腰长,则它的腰与下底夹角为( )
A.30° B.45° C.60° D.75°
答
3.若等腰梯形的两底之差等于一腰长,则它的腰与下底夹角为( )
A.30° B.45° C.60° D.75°