Is triangle ABC isoceles

[lancequas]

I'm having a problem completely grasping the data sufficiecy explanation for the isoceles triangle problem that ends with "these three sides would form back-to-back line segments if placed together in an attempt to form a triangle" Please help me see through the mental block I'm having

[tracerbullet]

Can you please post the question?

[mschwrtz]

Yes, please post the entire question verbatim.