AB距離為2根號13，AC距離為3根號13
由三角形的內分比性質可知
BD:CD=AB:AC=2:3
由內分點公式可知
D=(3B+2C)/5=(-1/5,4)
TVET CHNS,Eng,Maths
Senior High
求解謝謝！
A
1ㄎㄎ7-10.7
3.31
168
△ABC 中,A(1,-2)、B(-5,2)、C(7,7),∠A 的內角平分線交BC於D,求D點坐標
(-4)
)
Ans:(一
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