Mathematics
Junior High
๐ไธๅนณๆนใฎ็ฉบ้ๅณๅฝขใงใ
(2)ใฎโขใฎๆฑใๆนใๅใใใพใใ,,,
ๅณใๆธใใฆๆใใฆ้ ใใใใงใ๐๐ปโโ๏ธ
ๅณๅณใฎใใใช, AB = 6cm,โ ACB = 60ยฐ, <GBC = 45ยฐใฎ็ด
SLA
ๆนไฝใซใคใใฆ,ๆฌกใฎๅๅใใซ็ญใใชใใใ
(1) BGใฎ้ทใใๆฑใใชใใใ(
cm)
55081
(2) ่พบADใจ่พบCDใฎไธญ็นใใใใใ M, N ใจใใใ ใพใ, AC ใจ
BN ใฎไบค็นใPใจใใใ
$5 40 03
$364580
โ APB ใจโณCPN ใฎ้ข็ฉๆฏใๆฑใใชใใใ ใใ ใ, ๆใ็ฐกๅ
A.
H
-
B
F
2โ31
2โ7
ใชๆดๆฐใฎๆฏใง็ญใใชใใใ ( )
6ร
HAE
โก็นBใใ็ด็ท MN ใซไธใใๅ็ทใจ็ด็ทMN ใจใฎไบค็นใIใจใใใจใ, BI ใฎ้ทใใๆฑใใช
EST
cm)
15TH
โข ๅ่งๅฝข MEGN ใ็ด็ทEGใฎๅจใใซๅ่ปขใใฆใงใใๅ่ปขไฝใฎไฝ็ฉใๆฑใใชใใใ
C
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