nomor 1-2 yaaaaa. until dibawa besok pagi

A. Keliling = 2.22/7 . 21
= 2.22.3
= 132
Luas = πr²
= 22/7 21 21
= 1386
B. Volume = 2 3,14 .25
= 157
Luas = πr²
= 3,14 .25 .25
=1.962,5

1 . keliling = 2.π.r
= 2 × 22 / 7 × 21
= 22 × 2 = 44
= 44 × ( 21 : 7 = 3 )
= 132
Luas nya
π.r.r
= 22 / 7 ×21 ×21
= 1386
2 . keliling = π.d
3.14 × 50 = 157
luas
π.r. r
3.14 × 25×25 =
1962.5
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