โจ Best Answer โจ
ๆนในใใฎๅฎ็ใไฝฟใใฎใ ใจๆใใพใ
็ธไผผใไฝฟใฃใฆ่จผๆใงใใพใ
ใใใใจใใใใใพใโจ
Mathematics
Junior High
Solved
ๆฅใใงใ๐ฆ๐
ใใฎๅ้กใๅ
จใๅใใใพใใ๐ฅฒ
ๆใใฆใใ ใใ๐
19 ๅณใฎๅณใฎใใใซ, ๅOใซๅ
ๆฅใใ โณABC ใใใใๅOใฎ
ๅจไธใฎ็นAใซใใใๆฅ็ทใจ่พบBC ใฎๅปถ้ทใจใฎไบค็นใDใจใใใจ
ใ,ๆฌกใฎๅใใซ็ญใใชใใใ
B
(1) AABDS ACAD ใงใใใใจใ่จผๆใใชใใใ
2Cu
็ณ(2) AD=7 cm, CD=5cm ใจใใใจใ, BCใฎ้ทใใๆฑใใช
noA
ใใใ
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