9514 1404 393
Answer:
5.3
Explanation:
The Pythagorean theorem applies. The square of the hypotenuse is equal to the sum of the squares of the other two sides.
8² = x² + 6²
64 = x² +36
28 = x²
√28 = x ≈ 5.3
The missing measure is 5.3.
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Comment on the question
The triangle isn't marked, but we must assume it is a right triangle. If it is not a right triangle, we cannot find the missing measure.