Step 1: 
The radius of the circle is given as 12 inches. 
 

Step 2:

The diameter of a circle is twice the radius. 
 

Step 3:

Therefore, the diameter is: 
\[12 \space \text { inches} \times 2 = 24 \space \text { inches} \]  

Step 4:

Hence, the diameter of the circle is 24 inches.

Supplemental Knowledge:

In geometry, the diameter of a circle is twice the length of its radius. The radius is the distance from the center of the circle to any point on its circumference. Therefore, if you know the radius, you can find the diameter using the formula:

\[\text { Diameter} = 2 \times \text { Radius} \]

Given that the radius of this circle is 12 inches:

\[\text { Diameter} = 2 \times 12 \text { inches} = 24 \text { inches} \]

Real-World Applications:

Calculating the diameter of a circle can be immensely useful when designing circular objects (tables or wheels), measuring distance in circular tracks or planning events that feature circular arrangements. Knowing how to calculate its diameter from its radius will allow you to effectively plan any dinner parties featuring round tables in your space efficiently.

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