no 4 sampai 5 besok dikumpulkan tolong ya

4) A. 3 kali 2 = 6 : 2 = ...............
     B. d1 : d2 dikali 6 ............
     c.

4. B. L1 = phi × r^2 ÷ 2

= 3,14 × 6^2 ÷ 2

= 3,14 × 36 ÷ 2

= 3,14 × 18

= 56,52 cm^2


L2 = 1/2 × A × T

= 1/2 × 6 × 7

= 1 × 3 × 7

= 21 cm^2


LG = 56,52 + 21

= 77,52 cm^2



D. L = phi × r^2 ÷ 2

= 22/7 × 7^2 ÷ 2

= 22/7 × 49 ÷ 2

= 22 × 7 ÷ 2

= 11 × 7

= 77 cm^2



5. A. L = phi × r^2

616 = 22/7 × r^2

r^2 = 616 ÷ 22/7

r^2 = 616 × 7/22

r^2 = 28 × 7

r^2 = 196 (diakarkan pangkat 2)

r^2 = 14 cm


B. K = 2 × phi × r

= 2 × 22/7 × 14

= 2 × 22 × 2

= 88 cm