Mohon bantuannya kak​

Jawaban No 8

Tan 60° = RS / SQ

√3 = 9 / SQ

SQ = 9 / √3

SQ = 9√3 / 3

SQ = 3√3

Tan 30° = RS / PS

⅓ √3 = 9 / PS

√3 / 3 = 9 / PS

PS ( √3 ) = 27

PS = 27 / √3

PS = 27√3 / 3

PS = 9√3

PQ = PS + SQ

= 9√3 + 3√3

= 12√3

Jawaban No 9

K = 2πr

= 2 × 22/7 × ( 70 ÷ 2 )

= 2 × 22/7 × 35

= 22/7 × 70

= 22 × 10

= 220 cm

17,6 Km = 1.760.000 cm

Banyak Putaran

= 1.760.000 ÷ 220

= 8.000 Kali Putaran

Jawaban No 10

K = 62,8

2πr = 62,8

πr = 31,4

3,14 × r = 31,4

r = 10 cm

L = πr²

= 3,14 × 10²

= 3,14 × 100

= 314 cm²