又∵AB=AC,∠BCE=∠ABD,
∴△BAD≌△CBE,则∠BAD=∠CBE,
∵∠APE=∠ABP+∠BAD,
∴∠APE=∠ABP+∠CBE=∠ABC,
∴∠APE=∠ABC=60°
用含有字母的式子表示下面的数量关系, 正确的是
I am sitting _________ my best friend in the cinema now.