Thank you for the opportunity to help you with your question!
If both Planes R and D are perpendicular to line K, then Planes R and D are parallel because both are perpendicular to Line K, and if you have two perpendicular Planes to a line, then those 2 planes are parallel to each other.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 11th, 2015
Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.