2asinA = (2b+c)sinB + (2c+b)sinC
由正弦定理 a/sinA = b/sinB = c/sinC = k
2a² = (2b+c)b + (2c+b)c
a² = b²+c²+bc = (b+c)² - bc
48 = (b+c)² - 16
b+c = 8
周长a+b+c = 8+4√3
2asinA = (2b+c)sinB + (2c+b)sinC
由正弦定理 a/sinA = b/sinB = c/sinC = k
2a² = (2b+c)b + (2c+b)c
a² = b²+c²+bc = (b+c)² - bc
48 = (b+c)² - 16
b+c = 8
周长a+b+c = 8+4√3