Respuesta :

Answer:

remember it starts with 3.14 r3 d 3.14 = 9.14 hope this helps but always start with 3.14 then multiply with the circumfederance and diameter

Step-by-step explanation:

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1.

radius = 3 m

diameter = 3 × 2 = 6 m

formula = π × d

circumference = π × 6 = 18.85 m

2.

radius = 18 ÷ 2 = 9 cm

diameter = 18 cm

formula = π × d

circumference = π × 18 = 56.55 cm