How many points is ARC worth in Scrabble?

ARC is worth 5 points in Scrabble.

Is ARC a valid Scrabble word?

Yes, ARC is a valid Scrabble word worth 5 points.

Yes, ARC is a valid Words With Friends word worth 6 points.

YES — ARC is a valid Scrabble word 5 points

Scrabble US/CAN: 5 pts | Words With Friends: 6 pts

ARC is a valid Scrabble US/CAN word worth 5 points:

A₁R₁C₃

ARC is valid in Scrabble UK (World) —

A₁R₁C₃

ARC is a valid Words With Friends word worth 6 points:

A₁R₁C₄

You can make 3 words from arc according to the Scrabble US and Canada dictionary.