What is ge ?

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units
the figure shows what appears to be obtuse triangle e f g with obtuse angle e. point z is on side g e. single tick marks pass through segments g z and z e. point y is on side f g. double tick marks pass through segments f y and y g. point x is on side e f. triple tick marks pass through segments e x and x f. segment x y is drawn and has length 5. segment y z is drawn and has length 4.6