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= 22/7 * 28 *28
= 2464 cm^2
keliling lingkaran = *d
= 22/7 * 56
= 176
perbandingan
17,6 : 176
= 1 :10
Luas juring POQ = 2464 * 1/10
= 246,4 cm^2
28 ; 17,6
luas juring poq=?
Lj/pi*r*r=busurPQ/2*pi*r
Lj/22/7*28*28=17,6/2*22/7*28
Lj=17,6/2*22/7*28 kali 22/7*28*28
lalu di bagi silang
Lj=17,6/2 kali 28
=17,6*14
=246,4 cm persegi