26.如圖,在矩形ABCD中,AB=3cm,BC=6cm.點(diǎn)P從點(diǎn)D出發(fā)向點(diǎn)A運(yùn)動(dòng),運(yùn)動(dòng)到點(diǎn)A即停止;同時(shí),點(diǎn)Q從點(diǎn)B出發(fā)向點(diǎn)C運(yùn)動(dòng),運(yùn)動(dòng)到點(diǎn)C即停止,點(diǎn)P、Q的速度都是1cm/s.連接PQ、AQ、CP.設(shè)點(diǎn)P、Q運(yùn)動(dòng)的時(shí)間為ts.
(1)當(dāng)t為何值時(shí),四邊形ABQP是矩形,請(qǐng)說(shuō)明理由;
(2)當(dāng)t為何值時(shí),四邊形AQCP是菱形,請(qǐng)說(shuō)明理由;
(3)直接寫(xiě)出(2)中菱形AQCP的周長(zhǎng)和面積,周長(zhǎng)是
cm,面積是
cm
2.