Mathematics
Senior High
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横向きですいません。高一の数Aの図形の問題で、 回答をみてもなぜこの比になるのか分かりません。

(2) 8x = 24 x = 3 ADia Laagt ₁ B0:00 = AB. AC = 8 = 3 (7+x)x= 8.3 3(7+²)=8% したがって、メン B ZBAD=<DAC --7---- 3 E ZCAD=ZDAE D 6
図形

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