please help
calculate each unknown side length.

Answer:
Step-by-step explanation:
The Pythagorean theorem relates side lengths in right triangles. It tells you the square of the hypotenuse is equal to the sum of the squares of the sides.
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8.8² + x² = 11²
x² = 121 -77.44 = 43.56
x = √43.56 = 6.6 . . . inches
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6.6² +10² = y²
43.56 +100 = y² = 143.56
y = √143.56 ≈ 11.982
y ≈ 12.0 . . . inches