tolong dijawab ya..!!!

14. d
15. d
16. 1/2 × d1×d2 = 1/2 × 8× 10 = b. 40
17. 6+6+6+6 = d. 32
18. Luas permukaan kubus : 6×s2
= 6×30×30 = d. 5400
19. 25×15×8 = 3000 cm ÷ 1000 = a. 3 liter

14. D. tidak terhingga
15. D
16. L= d1 × d2 ÷ 2
        = 8 × 10 ÷ 2
        = 40 cm² (b)
17. Keliling= 4 × s
                  =4 × 6
                  =24 m (c)
18. Lp kubus= 6×s²
                    =6×900
                    = 5400 cm²(d)
19. Volume= P×L×T
                  =25×15×8
                  =3000cm³ ÷ 1000
                  =3 liter (a)

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