McGraw Hill Glencoe Geometry, 2012
MH
McGraw Hill Glencoe Geometry, 2012 View details
1. Points, Lines, and Planes
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Exercise 46 Page 9

Look for common points in the two planes.

QR

Practice makes perfect

Let's look for common points to find the line of intersection of plane A and plane QRV. Plane A contains the base of the prism, so it contains every vertex of this base, including Q and R.

Since points Q and R are in both planes, the line of intersection of plane A and plane QRV is QR.