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The diameter of a circle is [tex]4 \, \text{cm}[/tex]. Which equation can be used to find its circumference?

A. [tex]C = \pi \times 2[/tex]
B. [tex]C = \pi \times 4[/tex]
C. [tex]C = \frac{\pi \times 4}{2}[/tex]
D. [tex]C = \frac{\pi \times 4}{4}[/tex]


Sagot :

To find the circumference of a circle when the diameter is given, we use the formula:

[tex]\[ C = \pi \times d \][/tex]

where [tex]\( C \)[/tex] represents the circumference, [tex]\( \pi \)[/tex] is a mathematical constant approximately equal to [tex]\( 3.14159 \)[/tex], and [tex]\( d \)[/tex] is the diameter.

Given that the diameter ([tex]\( d \)[/tex]) of the circle is [tex]\( 4 \)[/tex] cm, we can plug this value into the formula:

[tex]\[ C = \pi \times 4 \][/tex]

Thus, the equation that can be used to find the circumference of the circle is:

[tex]\[ C = \pi \times 4 \][/tex]