<PRE><B>Question 542390</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;The sum of the three interior angles of ALL triangles is 180 degrees.&lt;br&gt;

The three interior angles of an equilateral triangle are equal to each other.&lt;br&gt;

Thus, each interior angle of ANY equilateral triangle must be 60 degrees, regardless of the length of the sides of the triangle.&lt;br&gt;

{{{180/3=60}}}&lt;br&gt;

A 60 degree angle is also an acute angle by definition, since it is less than 90 degrees.&lt;br&gt;

Each angle in triangle FGH must equal 60 degrees.&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>