Respuesta :

AL2006

The circumference of a circle is (pi) x (diameter)

The circumference of the cupcake is (pi) x (5 cm)

Halfway around is (1/2) x (pi) x (5 cm) = (2.5 pi cm) = about 7.85 cm

The 'why' appears up above, in the first 2 lines of this solution.

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