Monday, January 26, 2009

Elearn Geometry Problem 234: Parallelogram, Line through a vertex, Perpendicular lines

Problem: Parallelogram, Exterior line, Perpendicular lines

See complete Problem 234 at:
gogeometry.com/problem/p234_parallelogram_vertex_perpendicular_lines.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

Posted by Antonio Gutierrez at 10:52 AM
Labels: , , , , ,

2 comments:

  1. AnonymousJune 17, 2009 at 5:18 AM

    by JCA

    E=(AC)inter(CD)

    aire(ABCD)/2=aire(ABE)=b*AE/2

    aire(ABCD)/2=aire(ACD)=aire(ADE)+aire(ACE)=c*AE/2+d*AE/2

    b=d+c

    ReplyDelete
  2. c .t . e. oJanuary 5, 2010 at 8:39 AM

    draw DC" // AC', C" is point CC' meet it

    tr ABB' and DCC" are similar . Like P235

    b/AB = c+d/CD
    b = c+d

    ReplyDelete

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