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HuangHai
2025-08-30 18:35:01 +08:00
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- 延长$AC$至$D$,使得$AD=AB$
$\triangle ABP \cong \triangle ADP$
也就是$\triangle APB$根据$AP$翻折后得到$\triangle APD$
$\because \angle APB=150^{\circ}$
$\therefore \angle BPD=60^{\circ}$
并且$BP=PD$
$\therefore \triangle PBD$是等边三角形
$\because \angle PBC=30^{\circ}$
$\therefore \angle CBD=30^{\circ}$
$\triangle PBC \cong \triangle BCD$,$SAS$
$\therefore PC=CD$
$\therefore \angle CPD=\angle CDP$
而$\angle PDC=\angle ABP=6^{\circ}$
$\therefore \angle ACP=2*6^{\circ}=12^{\circ}$