1.如圖,已知網(wǎng)格上每個(gè)小的正方形的邊長(zhǎng)為1(長(zhǎng)度單位),點(diǎn)A、B、C在格點(diǎn)上.
(1)直接在平面直角坐標(biāo)系中作出△ABC關(guān)于y軸對(duì)稱的圖形A
1B
1C
1(點(diǎn)A對(duì)應(yīng)點(diǎn)A
1,點(diǎn)B對(duì)應(yīng)點(diǎn)B
1,點(diǎn)C對(duì)應(yīng)點(diǎn)C
1);
(2)△ABC的面積=
;點(diǎn)B到AC的距離=
;
(3)若在x軸上有一點(diǎn)P,使△PBC周長(zhǎng)值最小,此時(shí)△PBC周長(zhǎng)最小值為
.