Prove d || d' in Figure with A = A' = 90

Behrooz · Nov 14, 2007

hi,could u please help me with this Geometrical problem?
in this figure prove that : d||d'
Heres the figure:
as u see A=90 and so is A'

HallsofIvy · Nov 15, 2007

What do you have to work with? That is, what theorems about parallel lines do you know and can use? For example do you know "If 'corresponding angles' formed by a transversal crossing two lines are congruent, then the lines are parallel"? Or "If 'alternate interior angles' formed by a transversal crossing to lines are congruent then the lines are parallel"? If you know those, then you should be able to apply one to this problem.

Prove d || d' in Figure with A = A' = 90

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Prove d || d' in Figure with A = A' = 90

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