Find the circumference of a circle with a diameter equal to 1.8 dm.

P = 2πR circle length formula
D = 2R = 1.8 dm
R = 0.9 dm = 9 cm
Substitute the values into the formula
P = 2 × 3.14 × 9 ≈ 56.52 cm ≈ 56.5 cm
Answer: 56.5 cm



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