Tolong bantu jwb ya​

6.

Keliling Lingkaran

K = π × d

K = 22/7 × 70

K = 220 cm

Luas Lingkaran

r = 35 cm

L = π × r²

L = 22/7 × 35 × 35

L = 3.850 cm²

7.

Keliling Lingkaran

K = π × d

K = 22/7 × 84

K = 264 cm

Luas Lingkaran

r = 42 cm

L = π × r²

L = 22/7 × 42 × 42

L = 5.544 cm²

8.

Keliling Lingkaran

K = π × d

K = 3,14 × 100

K = 314 cm

K = 31,4 dm

Luas Lingkaran

r = 50 cm

L = π × r²

L = 3,14 × 50 × 50

L = 7.850 cm²

L = 785 dm²