Need help identifying a plant

I got a piece of this plant from a friend. He had no clue what it was called.
I think it is a neat looking plant and need to know how I can make it healthy.

Hi,

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Your plant is a Rieger Begonia. This is a beautiful and very popular flowering plant. All Begonia Plants have asymmetrical leaves, thick succulent stems, and flowers that grow in clusters. Begonia Plants are easily propagated from stem tip or leaf cuttings. Here are some care instructions for a Rieger Begonia and a picture of what it looks like in bloom.