That is correct. You should be aware that the internal angles of a triangle always add up to 180o. So if one of those angles exceeds 90o it follows that the other two angles will add up to less than 90o and so, by definition, will be acute and not obtuse.
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obtuse triangle
They can only intersect at the circumcentre, which is a point outside the triangle, beyond the side opposite the obtuse angle.
False, because a triangle can have only 1 obtuse angle
it i a triangle that only has one obtuse angle
no right angle with only one angle is obtuse