Note that we (E2efour/Paul and I) speak different varieties of English. Perhaps that explains it.
My premise is that rectangular being an adjective describing a shape, adding "-shaped" to it is superfluous and wrong. (Would you add "-shaped" to circular or triangular as well?)
I agree entirely as well.
I agree entirely. There are many ways to express the thought of "approximately rectangular," without taking a plunge into the redundancy abyss.
Not to me it couldn't. No way. Not ever. That would be a face of rectangles or a face with rectangular features.a rectangular face could mean that its features were rectangular
Rectangular-shaped is only one step away from rectangular-ish.