Answer: 13 cm
Explanation:
Length (l) = 4 cm
Width (w) = 3 cm
Height (h) = 12 cm
The formula for calculating the diagonal (c) of a rectangular prism is given by the equation:
c = √(l² + w² + h²)
Plugging in the given values, we get:
c = √(4² + 3² + 12²)
c = √(16 + 9 + 144)
c = √169
c = 13 cm
So, the missing length (c) of the rectangular prism is 13 cm.