TOLONG BANTU JAWAB!!
Jawaban:
a.
luas juring AOB = 231
60/360 × π × r² = 231
r² = 231 x 6 x 7/22
r² = 441
r = 21cm
b.
60/360 x keliling
= 1/6 × 22/7 × 21
= 462/ 42 = 11cm
Jawaban:
a.
luas juring AOB = 231
60/360 × π × r² = 231
r² = 231 x 6 x 7/22
r² = 441
r = 21cm
b.
60/360 x keliling
= 1/6 × 22/7 × 21
= 462/ 42 = 11cm