Based on the answers provided, the following corrections are needed for the 3D object:

1. Make sure that the center triangle is an equilateral triangle. This means all its sides and angles should be equal. 

2. Ensure that the triangles on the sides are acute-angled scalene triangles. This means all their sides and angles should be different, and all angles should be less than 90 degrees. 

Please make these changes while maintaining the current features that are correct, such as the resemblance to the profile of three mountains, the connected bases of all three triangles, and the extrusion from the profile.