KD. 3.5 45. Hitunglah luas dan keliling lingkaran di samping ! 28 cm​

Jawaban dengan langkah-langkah:

Diket:

d = 28 cm

r = 14 cm

Dty:

L = ….?

K = ….?

Jawab:

L = 3/4 × π × r²

= 3/4 × 22/7 × 14 × 14

= 3/4 × 616

= 462 cm²

K = 3/4 × π × d + d

= 3/4 × 22/7 × 28 + d

= (33/4 × 22/7 × 28) + 28

= (3/4 × 88) + 28

= 66 + 28

= 94 cm