已知,如图,P是三角形ABC的边AB上的一点,连接CP,AB=m,AC=n,当AP与m,n之间满足___ 时,三角形ACP相似于三角A
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链接MP和NP
MN垂直平分线AP
AM = MP AN = NP
让BP = 2,PC = 3,AM =,= B,
然后BM = 5 NC = 5-B,
△BPM余弦定理
MP 2 = BM 2 + BP 2-2BM * BPcos60°
2 =( 5)2 + 4-2(5)
2 = 25-10A + 2 +4-10 +2一个
8A = 25 +4-10
△余弦定理全国人大= 19/8
NP 2 = CN 2 + PC 2-2CN * PCcos60°
(5-B)B 2 = 2 +9-3(5-B)
B 2 = 25-10B + B 2 +9-15 +3B
B = 14/8
AM / AN = A / B = (19/8)/(7/19)= 7/8
MN垂直平分线AP
AM = MP AN = NP
让BP = 2,PC = 3,AM =,= B,
然后BM = 5 NC = 5-B,
△BPM余弦定理
MP 2 = BM 2 + BP 2-2BM * BPcos60°
2 =( 5)2 + 4-2(5)
2 = 25-10A + 2 +4-10 +2一个
8A = 25 +4-10
△余弦定理全国人大= 19/8
NP 2 = CN 2 + PC 2-2CN * PCcos60°
(5-B)B 2 = 2 +9-3(5-B)
B 2 = 25-10B + B 2 +9-15 +3B
B = 14/8
AM / AN = A / B = (19/8)/(7/19)= 7/8
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