Look at the square below:
What is the area of the square?
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Look at the square below:
What is the area of the square?
The area of the square is equal to the side of the square raised to the second power.
That is:
Since the drawing gives us one side of the square, and in a square all sides are equal, we will solve the area of the square as follows:
Look at the square below:
What is the area of the square equivalent to?
Area measures space inside the shape, not the distance around it. When you square 9, you're finding how many unit squares fit inside: 9 × 9 = 81 unit squares. Multiplying by 4 gives the perimeter!
means 9 × 9 = 81, while 2 × 9 = 18. The exponent 2 tells you to multiply 9 by itself, not by 2!
Think of it as "side times side" or imagine filling the square with unit squares. A 9×9 grid has 9 rows and 9 columns, so 9 × 9 = 81 total squares.
Yes! Since 9² is a perfect square, you can memorize that 9² = 81. Other perfect squares to remember: 1² = 1, 2² = 4, 3² = 9, 4² = 16, 5² = 25, etc.
The same formula works! . Just be extra careful with decimal multiplication.
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