Jawab dengan benartidak ngasaljawab semua​

Penjelasan dengan langkah-langkah:

8)

= 2 × π × r

= 2 × 22/7 × 14

= 2 × 22 × 2

= 88 Cm (B)

9)

= ½ × 2 × π × r

= ½ × 2 × 22/7 × 21

= ½ × 2 × 22 × 3

= ½ × 132

= 66 Cm (B)

10)

= π × r × r

= 3,14 × 10 × 10

= 314 Cm² (C)

11)

K = π × d

132 = 22/7 × d

d = 132 × 7/22

d = 42 Cm (A)

12)

L = π × r × r

616 = 22/7 × r²

r² = 616 × 7/22

r² = 196

r = 14 Cm (D)

13)

= θ/360 × π × r × r

= 72/360 × 22/7 × 20 × 20

= 1/5 × 22/7 × 400

= 1/5 × 1.257,14

= 251,4 Cm² (A)

14)

= ¾ × 2 × π × r

= ¾ × 2 × 22/7 × 14

= ¾ × 2 × 22 × 2

= ¾ × 88

= 66 Cm (–)

15)

= ½ × π × r × r

= ½ × 22/7 × 7 × 7

= 11 × 7

= 77 Cm (C)

Cara Jawaban =

8.)

K = phi x 2 x r.

K = 22/7 x 2 x 14.

K = 22/7 x 28 cm.

K = 88 cm ( B. )

9.)

K = phi x 2 x r x 1/2.

K = phi x r .

K = 22/7 x 21.

K = 66 cm ( B. )

10.)

L = phi x r x r.

L = 3,14 x 10 x 10 cm.

L = 3,14 x 100 cm.

L = 314 cm^2. ( C. )

11.)

D = Keliling ÷ phi.

D = 132 ÷ 22/7.

D = 132 x 7/22.

D = 42 cm ( A. )

12.)

r = √L ÷ Phi.

r = √616 ÷ 22/7.

r = √616 x 7/22.

r = √196 = 14 ( D. )

13.)

L . Juring.

72/360 = 1/5.

1/5 x L. Lingkaran.

1/5 x 22/7 x 20 x 20.

22/7 x 20 x 4.

22/7 x 80 cm.

= 251,4 cm^2 ( A. )

14.)

K = 3/4 x phi x 2 x r + 2 x r.

K = 3/4 x 22/7 x 2 x 14 + 2 x 14 cm.

K = 3/4 x 22/7 x 28 cm + 28 cm.

K = 94 cm ( C. )

15.)

L = 1/2 x phi x r x r.

L = 1/2 x 22/7 x 7 x 7.

L = 1/2 x 22/7 x 14 cm.

L = 77 cm ( C.)

Semoga membantu