Yes. If its a right angle there has to be an acute angle.
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A triangle is composed of 180 degrees. Two right angles = 180 degrees, the total number for all angles in a triangle. Thus a triangle can not have more than one right angle. l____________l <------ This is what two right angles look like, as you can see it cannot ever be a triangle.
never
No two sides of a triangle are ever parallel, and althoughit isn't required, a triangle can have all acute angles.That isn't possible for any shape with more than 3 sides.
no because its on the outside and the angle would be wrong.
Well, honey, a 190-degree angle is called an obtuse angle. It's bigger than a right angle but not quite as dramatic as a straight angle. So, if you ever come across a 190-degree angle, just remember it's too sassy to be acute but not quite obtuse enough to be a full 180.