Jawaban:
4.π.r² = 4 x( 22/7 x 21²)
= 4 x( 22/7 x 441)
= 4 x(1386)
= 5.54
Penjelasan:
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Jawaban:
4.π.r² = 4 x( 22/7 x 21²)
= 4 x( 22/7 x 441)
= 4 x(1386)
= 5.54
Penjelasan: