✨ Best Answer ✨
∠ABD＝∠ACB, ∠DAB＝BACより、三角形ACB∽三角形ADB よって、AB(9):AC(18)＝AD:AB＝1:2
よって、x＝AD＝1/2AB＝9/2
いえいえ✨
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✨ Best Answer ✨
∠ABD＝∠ACB, ∠DAB＝BACより、三角形ACB∽三角形ADB よって、AB(9):AC(18)＝AD:AB＝1:2
よって、x＝AD＝1/2AB＝9/2
いえいえ✨
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are also looking at these questions 😉
ありがとうございます！