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′ ′ ′是水平放置的一个平面图形的直观图,其中O.′A.′=4,O.′C.′=2,则原图形是( ) A.正方形B.矩形 C.菱形 梯形
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
= 2,则BD的长为 ( )A.4 3 2 1
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)
′ ′ ′是水平放置的一个平面图形的直观图,其中 O.′A.′=6 cm,C.′ ′=2 cm,则原图形是( ). A.正方形B.矩形C.菱形D.梯形
(3,2) (-2,-3) (2,3)或(-2,-3) (3,2)或(-3,-2)
5 cm 10 cm 15 cm 7.5 cm
(-2,3) (2,-3) (3,-2)或(-2,3) (-2,3)或(2,-3)