Based on the answers provided, the following corrections need to be made to the 3D object:

1. The object needs to be reshaped into an isosceles triangle. Currently, it has multiple faces that are quadrilaterals. The object should be redesigned such that it has only three faces, two of which are identical in length, forming an isosceles triangle.

2. The object's length is unclear. While we don't need to know the exact dimensions, the object should be designed in a way that it clearly appears long in length. This could be achieved by elongating the object along one dimension.

Remember, the object should still be extruded in one dimension as it currently is.