(1)如图所示:
(2)点A〞,B〞,C〞的坐标分别为:A〞(2,4),B〞(6,2),C〞(0,0);
(3)在图上取三点D(6,0),E(6,4),F(0,4),
则四边形ODEF为矩形,
∴S △ABC=S △A''B''C′′=S 矩形ODEF-S △ODB″-S △B″ EA″-S △OFA″=4×6-
1
2 ×6×2-
1
2 ×4×2-
1
2 ×4×2=10.
1年前
8
(1)如图所示:
(2)点A〞,B〞,C〞的坐标分别为:A〞(2,4),B〞(6,2),C〞(0,0);
(3)在图上取三点D(6,0),E(6,4),F(0,4),
则四边形ODEF为矩形,
∴S △ABC=S △A''B''C′′=S 矩形ODEF-S △ODB″-S △B″ EA″-S △OFA″=4×6-
1
2 ×6×2-
1
2 ×4×2-
1
2 ×4×2=10.
1年前
8