Mathematics
Junior High
中3数学です。
解き方の解説よろしくお願いします🙇🏻♀️
M
DESEF, FD
14 右の図の△ABCにおいて,∠Aの外角の二等分線と辺BCの
延長との交点をDとする。 xの値を求めなさい。 (20点)
BD:DC=AB:AC
(4+x)=x=5:3
3(4+x) 25x
x26
B^---4-
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