Question

已知P为第四象限一动点,A为X轴负半轴上一动点,B为Y轴正半轴上一动点,若AM,BM分别平分∠OPA、∠OBP

Answer 1

2∠M-∠P=90°其实不用辅助的,就两个四边形BMAP,BOAP,用∠OBP,∠OAP,∠P表示内角就能够计算出来了.1.∠M=360°-(360°-∠P-∠MBP-∠MAP)=360°-(360°-∠P-1/2∠OBP-1/2∠OAP)2.∠AOB=90°=360°-(360°-∠OBP-∠OAP...