Take note Postulate 1-4

Through any three noncollinear points there is exactly one plane.

Points Q, R, and S are noncollinear. Plane P is the only plane that contains them.

Problem 4 Using Postulate 1-4

Use the figure below.

1. What plane contains points N, P, and Q? Shade the plane.

   

   The plane on the bottom of the figure contains points N, P, and Q.

   Plan

   How can you find the plane?

   Try to draw all the lines that contain two of the three given points. You will begin to see a plane form.

2. What plane contains points J, M, and Q? Shade the plane.

   

   The plane that passes at a slant through the figure contains points J, M, and Q.

✓ Got It?

4. 1. What plane contains points L, M, and N? Copy the figure in Problem 4 and shade the plane.
   2. Reasoning What is the name of a line that is coplanar with J K ↔ modified j k with left right arrow above  and K L ↔ ? modified k l with left right arrow above , question mark