Mathematics
Senior High
Resolved
่ณๆฅใงใ๐โโ๏ธ๐โโ๏ธ
๏ผ2๏ผใฎDEใจAEใๆใใฆใใใ ใใใใงใ
ใใใใฆ, ZPAB=ZPCB, ZPAC= ZPBC ใช
ใใฐใZPBA=ZPCAใๆใ็ซใคใใจใ่จผๆใใใ
P
B
4ZABC=D60ยฐ, ZACB= 75ยฐ, BC=2ใฎ โณABCใใใ, ้ ็น C, Bใใ่พบ AB,
AQใซๅ็ท CD, BE ใไธใใใใพใ, CDใจ BE ใฎไบค็นใFใจใใใใใฎใจใ,ๆฌก
ใฎๅใใซ็ญใใใ
ๅฃ(1) ZBED, ZEDF ใฎๅคงใใใๆฑใใใ
D
2BED= 30ยฐ.
LEDF=15ยฐ
600
B
F
ๅฃ(2) DE, AF, AE ใฎ้ทใใๆฑใใใ
75ยฐ
AF- 2
132
13 ๅ
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