Question

1. the intersection of plane b and plane a is
2. which three points are collinear?

r, s, t

Explanation:

Step1: Identify plane intersection rule

Two intersecting planes meet at a line. From the diagram, planes A and B intersect along line $m$.

Step2: Identify collinear points

Collinear points lie on a single line. Points $R$, $S$, and $T$ lie on the same straight line in plane B.

Answer:

1. Line $m$
2. Points $R$, $S$, and $T$