Intuitive introduction R E=A WIth dot prod A P=R+pts at inf Naturally everything starts from the known vector space add two vector multiply any vector by any scalar zero vector - origin finite basis9 with dot prod. n n E = A pts at inf. n n A n P = R + n R    Naturally everything starts from the known vector space • add two vectors • multiply any vector by any scalar • zero vector – origin • finite basis Intuitive introduction