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diket.
luas = 154 cm.
π = 22/7.
dit.
diameter (d).
rumus.
keliling = πd.
luas = πr².
jawab.
154 = 22/7. r²
r² = 154. 7/22.
r² = 49.
r = √49 = 7 cm.
jadi.
d = 2r.
d = 2.7.
d = 14 cm.
cmiiw.
154 = 22/7 × r^2
r^2 = 7/22 × 154
= 49 diakar
r = 7
d = r × 2
= 7 × 2
= 14cm