[IB Math SL] 12-3a Equations of Lines (part a)

[katiemcdaniel]

vector equation of a line in two and three dimensions
R=a+tb
-each value of t describes a point on the line r

[katiemcdaniel]

vector equation of a line in two and three dimensions
R=a+tb
-each value of t describes a point on the line r
Intersecting, parallel, and skew straight lines
-two intersecting straight lines
-two parallel lines
-two skew straight lines
Parallel lines: if the direction vectors are parallel, then the lines are. Check to see if one of the direction vectors is a scalar multiple of the other, then check if they are coincident by checking if point à is on line B
are the lines intersecting or skew?
If you have ruled out parallel, set up a system of equations to find the point of intersection