please solve this problem using the pythagorean theorem, and give me the right answer and I will give you brainliest. :)

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Explanation:
Check out the diagram below.
Use the Pythagorean Theorem to find the length of c.
[tex]a^2 + b^2 = c^2\\\\c = \sqrt{a^2 + b^2}\\\\c = \sqrt{(6.3)^2 + (6.3)^2}\\\\c = \sqrt{39.69+39.69}\\\\c = \sqrt{79.38}\\\\c \approx 8.9095\\\\c \approx 8.9\\\\[/tex]
The distance from one corner to the opposite corner is about 8.9 inches.