Tolobg di bantu y:)
Jawaban:
luas gabungan
= luas segitiga + luas ½ lingkaran
= (½ × alas × tinggi) + (½ × πr²)
= (½ × 42 × 20) + (½ × ²²/7 × (42 : 2)²
= (42 × 10) + (11/7 × 21²)
= (420) + (11/7 × 441)
= 420 + (11 × 63)
= 420 + 693
= 1.113 cm² (C)