It is true
True
true
true
True, an equilateral triangle has three equal interior angles of 60 degrees.
It is true
True
true
true
True, an equilateral triangle has three equal interior angles of 60 degrees.
Yes and their other two angles are acute angles.
No. That is true only of a 90° angle.
That all interior angles are equal in size.
No because the interior angles add up to 1440 degrees
True the 3 interior angles of any triangle always add up to 180 degrees
Yes it is true that they both have interior angles that add up to 540 degrees.
That is only true of triangles and is a consequence of the parallel postulate. In fact it is an alternative way of stating Euclid's parallel postulate.