The surface area of a cube is 24 cm². How long is the cube's side?
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The surface area of a cube is 24 cm². How long is the cube's side?
To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: The problem gives us that the surface area of the cube is 24 cm².
Step 2: We'll use the formula for the surface area of a cube: , where is the surface area and is the side length.
Step 3: Substitute the given surface area into the formula and solve for :
Divide both sides by 6 to isolate :
Take the square root of both sides to solve for :
Therefore, the solution to the problem is cm.
A cube has a total of 14 edges.
A cube is a 3D shape with faces on all sides: top, bottom, front, back, left, and right. That's 6 faces total, each one a perfect square!
Sometimes cube problems give you perfect square roots like . If you get a decimal, double-check your arithmetic - many textbook problems are designed to have whole number answers.
You must use the square root to find the side length! Once you have , taking the square root is the only way to isolate the variable s.
Think of unfolding a cube - you get 6 identical squares! Each square has area , so total surface area is .
Since surface area is given in cm², your side length will be in cm (the square root of the area units). Always include units in your final answer!
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