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Verified answer
No. 9360 = 2x + x+25 + 3x + 2x+15
360 = 8x +40
320 = 8x
x = 40
Busur DE = 2x+15 = 2.40+15 = 80+15 = 95°
Busur FG = x+25 = 40+25 = 65°
Busur DG = 3x = 3.40 = 120°
No. 10
L = s²
L = 120²
L = 14400cm²
Berapa banyak = 14400 : 6,28 = 2292 buah
2x+2x+x+3x+15+25=360
8x+40=360
8x=360-40
8x=320
x=40
b.∠DOE =2x+15=2(40)+15=95°
Busur EF= 8cm --->∠EOF =2x = 2(40)=80°
busur DE =95/80 x 8 =9,5 cm
c.∠FOG =x+25 = 40+25=65°
Busur FG = 65/80 x 8 =6,5 cm
d.∠DOG =3x =3(40)=120°
busur DG = 120/80 x 8 =12 cm
10.L persegi = s²
=120²
=14400 cm²
bnyak tutup botol = 14.400/6,28 =2292,994 buah
=2292 buah (pembulatan)