Jawaban:
378 cm²
Penjelasan dengan langkah-langkah:
Luas persegi
S × S
= 42 × 42
= 1.764 cm²
Luas lingkaran
[tex]\pi \times r {}^{2} \\ \ = \frac{22}{7} \times 21 \times 21 \ \\ \\ = 22 \times 3 \times 21 = 66 \times 21 \\ \\ = 1.386 \: cm {}^{2} [/tex]
Luas yang diarsir
1.764 - 1.386
= 378 cm²
semoga bermanfaat ^-^
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Jawaban:
378 cm²
Penjelasan dengan langkah-langkah:
Luas persegi
S × S
= 42 × 42
= 1.764 cm²
Luas lingkaran
[tex]\pi \times r {}^{2} \\ \ = \frac{22}{7} \times 21 \times 21 \ \\ \\ = 22 \times 3 \times 21 = 66 \times 21 \\ \\ = 1.386 \: cm {}^{2} [/tex]
Luas yang diarsir
1.764 - 1.386
= 378 cm²
semoga bermanfaat ^-^