Hitunglah keliling dan luas lingkaran berikut apabila= a) r= 9 cm B) d= 10 cm

langsung aja y

A.
K = 2πr
K = 2 × 3,14 × 9
K = 56,52 cm

L = πr²
L = 3,14 × 9²
L = 254,34 cm²

B.
K = πd
K = 3,14 × 10
K = 31,4 cm

r = d/2 = 10/2 = 5 cm

L = πr²
L = 3,14 × 5²
L = 78,5 cm²

semoga berguna +_+

a) Keliling
=π×d
=3,14×18
=56,52cm

Luas
=π×r²
=3,14×9×9
=3,14×81
=254,34cm²

b) Keliling
=π×d
=3,14×10
=31,4cm

Luas
=π×r²
=3,14×5×5
=3,14×25
=78,5cm²