23.如圖,在平面直角坐標(biāo)系中,△ABC的三個(gè)頂點(diǎn)的坐標(biāo)分別為A(-3,4),B(-4,1),C(-1,2).
(1)在圖中作出△ABC關(guān)于x軸的對(duì)稱圖形△A
1B
1C
1;
(2)請(qǐng)直接寫出點(diǎn)C關(guān)于y軸的對(duì)稱點(diǎn)C'的坐標(biāo):
;
(3)△ABC的面積=
;
(4)在y軸上找一點(diǎn)P,使得△PAC周長(zhǎng)最小,并求出△PAC周長(zhǎng)的最小值.