Question

Need help with this question please!!

Answer 1

11.1

Explanation:

Use the Pythagorean theorem to find the unknown side.

`a^(2) +b^(2) =c^(2) \\AB^(2) +BC^(2) =AC^(2) \\AB^(2) +19^(2) =22^(2) \\\\AB^(2)=22^(2)-19^{2\\AB=√(123) \\AB=11.1`