backing angle

13 LETTERS · STARTS WITH B

backing angle is a valid 13-letter word worth 22 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3A1C3K5I1N1G2A1N1G2L1E1

3 + 1 + 3 + 5 + 1 + 1 + 2 + 0 + 1 + 1 + 2 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does backing angle mean?