What is the Projection of Line M_1P on Plane \pi?

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SUMMARY

The discussion focuses on finding the projection of the line M_1P onto the plane π, defined by the lines l_1 and l_2. The point M is given as (1,2,3), and the intersection point P of lines l_1 and l_2 is crucial for determining the projection. Participants emphasize the importance of calculating the equation of the plane and utilizing the plane's normal vector to facilitate the projection process. The initial step involves accurately identifying point P before proceeding with the projection calculations.

PREREQUISITES
  • Understanding of vector equations and line representation in three-dimensional space.
  • Knowledge of plane equations and how to derive them from line intersections.
  • Familiarity with projection concepts in vector calculus.
  • Ability to work with normal vectors in relation to planes.
NEXT STEPS
  • Calculate the intersection point P of lines l_1 and l_2 using parametric equations.
  • Derive the equation of the plane π from the intersection of lines l_1 and l_2.
  • Learn about vector projections, specifically how to project a point onto a plane.
  • Explore the use of normal vectors in determining distances from points to planes.
USEFUL FOR

Students studying geometry, particularly those tackling vector projections and plane equations, as well as educators seeking to clarify these concepts in a classroom setting.

chmate
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Homework Statement



Given \pi: \begin{cases}l_1: \frac{x-2}{4}\ = \frac{y-1}{2}\ = \frac{z+5}{-4} &\\l_2: \frac{x+4}{-2}\ = \frac{y+1}{0}\ = \frac{z}{1} & \end{cases} and the point M=(1,2,3) outside the plane. Find the projection of the line M_1P on plane \pi where P is the intersection point of lines l_1, l_2.2. The attempt at a solution

All I can do is that I can find the equation of plane \pi but don't have any idea what to do next. So I need your help.

Thank you.
 
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How can you use the plane normal vector ?
Just make some "expriment" with a pen on your desk as a plane.
 
What is M_1? You never defined what it is.

Start by finding P.
 

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