<p>4^2 + 3^2 < 6^2 so by the converse of the Pythagorean theorem, the triangle is obtuse. The obtuse angle must be opposite the largest side (6), so x is obtuse and hence > 90.</p>
<p>4^2 + 3^2 < 6^2 so by the converse of the Pythagorean theorem, the triangle is obtuse. The obtuse angle must be opposite the largest side (6), so x is obtuse and hence > 90.</p>