Answer:
Well, one thing, is that a triangle's side's angles add up to 180 degrees. So right now, you have 64 degrees as ONE side. x is very easy to find, because it is a right angle. A right angle is always exactly 90 degrees. So as for now, you have 90 degrees, and 64 degrees. Now add up the two sides, and subtract. (180 degrees - 154 degrees) so, the third side would have to be 26 degrees, if my calculations are right. The top is an acute triangle, the left angle is the right angle, and the given angle is 64 degrees, which is an acute triangle.
I really hope this helped you! Thanks! Have a great day!
