Eqpr1. Understand the Problem In the diagram, you are given three lines, p, q, andr, that intersect at point B. You need to name two different planes that contain line r.2. Make a Plan The planes should contain two points on line rand one point not on line r. 3. Solve the Problem Points Dand Fare on line r. Point Edoes not lie on line r. So, plane DEFcontains line r. Another point that does not lie on line ris C. So, plane CDFcontains line r. Note that you cannot form a plane through points D,B, and F. By definition, three points that do not lie on the same line form a plane. Points D,B, and Fare collinear, so they do notform a plane.4.Look Back The question asks for two different planes. You need to check whether plane DEF and plane CDFare two unique planes or the same plane named differently. Because point Cdoes not lie on plane DEF, plane DEF and plane CDFare different planes.Monitoring ProgressHelp in English and Spanish at BigIdeasMath.comUse the diagram that shows a molecule of phosphorus pentachloride.GKLIJHs8.
Name two different planes that contain line s.9.
Name three different planes that contain point K.10. Name two different planes that contain ⃗HJ .
1. WRITING Compare collinear points and coplanar points.2. WHICH ONE DOESN’T BELONG? Which term does notbelong with the other three? 3.
Name four points.4. Name two lines.5.
Name the plane that contains points A, B, and C.6. Name the plane that contains points A, D, and E.7. Give two other names for ⃖ ⃗WQ .8. Give another name for plane V. 9. Name three points that are collinear. Then name a fourth point that is not collinear with these three points.