2.3两小题,过程,答案,急求
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2. ∵∠AOC=90°; ∠ AOB=m
∴ ∠BOC= ∠AOC- ∠ AOB= 90°- m
又OM平方∠AOB,ON平平分∠BOC
∴ ∠MOB =∠ AOB/2=m/2
∠BON =∠ BOC/2=(90 °- m)/2
∴∠MON=∠MOB+ ∠BON = m/2 +(90 °- m)/2=45°
3. ∵∠AOC=90°; ∠ BOC=n
∴ ∠AOB= ∠AOC- ∠ BOC= 90°- n
又OM平方∠AOB,ON平平分∠BOC
∴ ∠MOB =∠ AOB/2=(90°- n)/2
∠BON =∠ BOC/2=n/2
∴∠MON=∠MOB+ ∠BON = (90 °-n)/2 +n/2 =45°
∴ ∠BOC= ∠AOC- ∠ AOB= 90°- m
又OM平方∠AOB,ON平平分∠BOC
∴ ∠MOB =∠ AOB/2=m/2
∠BON =∠ BOC/2=(90 °- m)/2
∴∠MON=∠MOB+ ∠BON = m/2 +(90 °- m)/2=45°
3. ∵∠AOC=90°; ∠ BOC=n
∴ ∠AOB= ∠AOC- ∠ BOC= 90°- n
又OM平方∠AOB,ON平平分∠BOC
∴ ∠MOB =∠ AOB/2=(90°- n)/2
∠BON =∠ BOC/2=n/2
∴∠MON=∠MOB+ ∠BON = (90 °-n)/2 +n/2 =45°
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