Jawab dengan benartidak ngasaljawab semuanya​

Jawaban:

16. Juring lingkaran

17. dik. lingkaran

D = 25 cm

π = 3,14

kel = Dπ = 25 x 3,14 = 78,5 cm

18. dik. lingkaran

r = 14 cm

π = 22/7

Luas = πr²

= 22/7 x 14 x 14

= 616 cm²

19. dik. lingkaran

kel = 616 cm

π = 22/7

dit. D?

jawab :

kel = Dπ

616 = D•22/7

D = 616 : 22/7

= 616 x 7/22

= 196 cm

20. bangun 1/4 lingkaran

r = 14 m

D = 2r = 2•14 = 28 cm

π = 22/7

kel = 1/4 • D • π

= 1/4 •28•22/7

= 22 m

Cara Jawaban =

16..) Juring Lingkaean.

17.)

K = phi x d.

K = 3,14 x 25 cm.

K = 78,5 cm.

18.)

L = phi x r x r.

L = 22/7 x 14 x 14.

L = 22/7 x 196 cm.

L = 616 cm^2.

19.)

D = keliling ÷ phi .

D = 616 ÷ 22/7.

D = 616 x 7/22 cm.

D = 196 cm.

20.)

Keliling.

Phi x 2 x r + 2 x r.

22/7 x 2 x 14 + 2 x 14.

22/7 x 28 + 28.

88 + 28 = 116 cm^2.