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[3Putt]

I never said Homer came up with the D-plane . . . however in 2-D-0 . . . he clearly says PRACTICALLY right angles to the face . . .

Sorry if this post doesn't fit.

My book (7th ed) in 2-D-0 says "properly at right angles", not "practically". I noticed this from the very first time I read the book because it is an unusual combination of words.

Is it meaningful? a typo? a 7th ed change?

Thanks.

[KevCarter]

Sorry if this post doesn't fit.

My book (7th ed) in 2-D-0 says "properly at right angles", not "practically". I noticed this from the very first time I read the book because it is an unusual combination of words.

Is it meaningful? a typo? a 7th ed change?

Thanks.

A typo that appeared in the 7th edition. The 6th edition says practically.

Kevin