Jawaban:
b. 28,5cm²
Penjelasan dengan langkah-langkah:
Jawab =
Luas Tembereng = Luas Juring Lingkaran - Luas Segitiga
Luas Tembereng = (πr² × s/360) - (a×t/2)
Luas Tembereng = (3,14 × 10 × 10 × 90/360) - (10×10/2)
Luas Tembereng = (314 × 1/4) - (100/2)
Luas Tembereng = 78,5 - 50
Luas Tembereng = 28,5cm² (b)
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Jawaban:
b. 28,5cm²
Penjelasan dengan langkah-langkah:
Jawab =
Luas Tembereng = Luas Juring Lingkaran - Luas Segitiga
Luas Tembereng = (πr² × s/360) - (a×t/2)
Luas Tembereng = (3,14 × 10 × 10 × 90/360) - (10×10/2)
Luas Tembereng = (314 × 1/4) - (100/2)
Luas Tembereng = 78,5 - 50
Luas Tembereng = 28,5cm² (b)