Jawaban:

1. Panjang AG = √(p² + l² + t²)

= √(16² + 12² + 15²)

= √(256 + 144 + 225)

= √625

= 25 cm

2. Panjang total rusuk balok =

panjang dan lebar rusuk balok =

2 x (2 x (16+12))

= 2 x (2 x 28)

= 2 x 56

= 112 cm

tinggi rusuk balok =

15 x 4

= 60 cm

panjang total rusuk balok =

112 + 60 = 172 cm

3. Luas alas balok = p x l

= 16 x 12 = 192 cm²

4. Luas permukaan balok = 2 x (pl + pt + lt)

= 2 x (16 x 12 + 16 x 15 + 12 x 15)

= 2 x (192 + 240 + 180)

= 2 x 612

= 1224 cm²

5. Volume balok = p x l x t

= 16 x 12 x 15 = 2880 cm³

Jawaban :

1. 4 (25 cm)

2. 5 (172 cm)

3. 3 (192 cm²)

4. 2 (1224 cm²)

5. 1 (2880 cm³)