Hey, In the GEOMETRY application I drew any triangle and filled it with purple color. Then I wanted to calculate its surface area. When I entered the area(GD) command, the fill colour of the triangle changed from purple to very dark. Ugly and unpleasant view. I was also drawing other geometric figures such as: square, rectangle, parallelogram, circle, ellipse. Everywhere there is this problem. Then I wanted to determine if this problem occurs when I calculate the circumference of a triangle. Unfortunately, here this problem does not occur. The perimeter command (GD) does not change the color of the inner triangle. This leads to the following conclusion. The error I described in the GEOMETRY application, is to be quickly corrected. Attached are screenshots of the calculator.