(1) 已知∠A等于30°,∴∠ABC+∠ACB=150°
∵DC和DB平分∠ABC和∠ACB∴∠DBC+∠DCB=75°,∴∠D105°
∵∠ABC+∠ACB,∴∠FCB+∠EBC=360°-150°=210°
∵PC和PB平分∠FCB和∠EBC∴∠FCB+∠EBC=105°∴∠P=75°
(2) 不变化,∵设∠A=X°,则∠D=90°+0.5X°,∠P=90°-0.5X°
∠D+∠P=180°,与X的取值无关
∴不变化
(1) 已知∠A等于30°,∴∠ABC+∠ACB=150°
∵DC和DB平分∠ABC和∠ACB∴∠DBC+∠DCB=75°,∴∠D105°
∵∠ABC+∠ACB,∴∠FCB+∠EBC=360°-150°=210°
∵PC和PB平分∠FCB和∠EBC∴∠FCB+∠EBC=105°∴∠P=75°
(2) 不变化,∵设∠A=X°,则∠D=90°+0.5X°,∠P=90°-0.5X°
∠D+∠P=180°,与X的取值无关
∴不变化