Mathematics
Junior High
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ๆฅใใงใ๐ฆ
ใใฎ2ๅใฎ่งฃใๆนใๆใใฆใใ ใใ๏ผ
็ญใใๅใใใฐๆใใฆใใใ ใใใใงใใใ่งฃใๆนใ ใใงๅคงไธๅคซใงใ๐
ใใใใใ้กใใใพใ๐๐ปโโ๏ธ
9 ๆฌกใฎใใใชใใใๅฝขใฎ้ข็ฉใๆฑใใชใใใ
(1) ๅๅพใ4cmใง, ๅผงใฎ้ทใใ8cmใฎใใใๅฝข
15ฯL cmยฒ
(2) ๅๅพใ10cmใง, ๅผงใฎ้ทใใ30cm ใฎใใใๅฝข
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ๅญฆๆ กใง็ญใๅใใใใใฃใใใงใใใฉใ2ๅใจใๅใฃใฆใพใใ(โงโฝโฆ)
ใไธๅฏงใซใใใใจใใใใใพใใ๐๐