bantu jawab pls butuh
Jawab:
5. (B) 481,25 cm2
6. (C) 70,5 cm
Penjelasan dengan langkah-langkah:
5. Luas 1/2 lingkaran = 1/2 * Luas lingkaran
= 1/2 * [1/4 * 22/7 * diameter * diameter]
= 1/2 * [1/4 * 22/7 * 35* 35]
= 1/2 * [1/4 * 22 * 5* 35]
= 481,25 cm2 (B)
6. Keliling = 3/4 * keliling lingkaran + jari2 + jari2
= [3/4 * 22/7 * 21] + 10.5 + 10.5
= [3/2 * 11 * 3] + 21
= 99/2 + 21
= 49,5 + 21
= 70,5 cm (C)
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