no 3-5 pliss bantuinn tp pake caranya ya makasi:)

3. 20 x 14 = 280
1/2 x 3,14 x 10² = 157
280 + 157 = 437

4. 12 x 12 = 144
144 x 6
= 864

5. 5 x 5 x 5
= 125 cm³

Selamat Belajar :))

3.
Luas setengah lingkaran
D = 20 cm
r = D/2 = 20/2 = 10 cm

L = 1/2.π.r²
L = 1/2 x 3,14 x 10²
L = 1/2 x 3,14 x 100
L = 1/2 x 314
L = 157 cm²

Luas persegi panjang
p = 20 cm
l = 14 cm

L = p x l
L = 20 cm x 14 cm
L = 280 cm

Luas gabungan
L.= 157 cm² + 280 cm²
L = 437 cm²

Jawaban C

4.
Luas permukaan = 6.s²
L = 6 . 12²
L = 6 x 144
L = 864 cm²

Jawaban B

5.
Volume = s³
V = 5³
V = 125 cm³

jawaban B