hitung keliling lingkaran jika jari jarinya 42cm

Jawaban :

Keliling = phi x diameter
Diameter = 42 cm x 2 = 84 cm
Keliling = 22/7 x 84 cm = 264 cm

Semoga membantu ^_^

K = π × 2 × r.
K = 22/7 × 2 × 42cm.
K = 22 × 2 × 6cm.
K = 44 × 6cm.
K = 264cm.

semoga bermanfaat!!