Mathematics
Junior High
๐๐ช๐๐จ๐ฉ๐๐ค๐ฃ ๏ผ็นPใ่พบCDไธใซใใใจใใyใxใฎๅผใง่กจใใชใใใ
็ญใใy=-4x+56ใซใชใใฎใงใใ่งฃใๆนใๅใใใพใใ๐ฆ้ไธญๅผ่พผใง่งฃ่ชฌใ้กใ่ดใใพใ๐โโ๏ธ๐โโ๏ธ"
2 ๅณ 1ใฎใใใซ, AD ใจ
ๅณ1
B
C
BC ใๅนณ่กใง AB=5 cm,
ใญใใ
5cm
P
CD=4 cm ใฎๅฐๅฝขใฎ่พบไธ
4cm
ใ,้ ็นAใๅบ็บใใฆ
A
D
AโBโCโD ใฎ้ ใซ,
ๆฏ็ง1cmใฎ้ใใงๅใ็น
PใใใใPใAใๅบ็บ
ๅณ2
ใใฆใใx็งๅพใฎโณAPD
20
ใฎ้ข็ฉใy crรญใจใใใจ, x
ใจyใฎ้ขไฟใฏๅณ2ใฎใใ
ใซใชใใใใใซใคใใฆๆฌกใฎ
ๅใใซ็ญใใชใใใ
[ๅ2็นร3]
0
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