hitung lah luas bangun datar diatas....
Jawaban:
1/2 lingkaran=
(π x r x r)/2.
22/7 × 21×21/2
22/7×441/2
22×63/2
1386/2
693 cm
Jawaban:
903 cm²
Penjelasan dengan langkah-langkah:
[tex]setengah \: lingkaran \\ r \: = 42 \div 2\\ = \frac{1}{2} \times \frac{22}{7} \times 21 \times 21 \\ = \frac{1}{2} \times \frac{22}{7} \times 441 \\ = \frac{11}{7} \times 441 \\ = 11 \times 63 \\ = 693 \: cm \\ \\ persegi \: panjang= 42 \times 5 \\ = \ 210cm \\ \\ = 693 + 210 = 903 \: {cm}^{2} [/tex]
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