Mathematics
Senior High
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็จ[zon7 ็ฆๅฒกๅคง]
ใธABC ใจไบฌ Pใฎๅใซ 2PA +3PB-+ 5PC=ใ0 ใจใใ้ขไฟใใใใจใ, ็ด็ท AP ใจ่พบ BC
ใจใฎไบค็นใ Q ใจใใใใใฎใจใ, AP ใ AG ใ็จใใฆ่กจใใจใ | ใงใใใใพใ, ็ด
็ท BP ใจ่พบ AC ใจใฎไบค็นใ R ใจใใใจใ, ใธPBQ ใจ ใธPAR ใฎ้ข็ฉๆญคใฏ
ใธPBQ : ใธPAR= | ใงใใใ
ใฎ) ๅ
จ4G ใฎ) 7:12
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