tolong ya kak nomer 1 dan 2

1.
Tinggi :
t = √20² - 12²
t = √400 - 144
t = √256
t = 16 cm

Luas :
L = a × t
L = (12 + 9) × 16
L = 21 × 16
L = 336 cm²

2.
Luas Persegi Panjang :
L = pl
L = 72 × 56
L = 4.032 cm²

Luas Setengah Lingkaran :
L = ¼ × ½πr²
L = ⅛ × 22/7 × 56 × 56
L = 22 × 8 × 7
L = 22 × 56
L = 1.232 cm²

Luas :
L = 4.032 cm² - 1.232 cm²
L = 2.800 cm²

Maaf Kalau Salah