Here's what we know:
* Angelic appearances are often described symbolically: The Bible uses poetic language to describe angels, focusing more on their power and purpose than their physical features.
* Appearance varies: Different accounts depict angels with different characteristics (e.g., clothed in white, shining brightly, with wings).
* Emphasis on message, not appearance: The focus in the resurrection accounts is on the message the angels delivered (that Jesus had risen) rather than their physical form.
Therefore, we cannot know for certain what the angel who announced Jesus' resurrection looked like. The Bible provides enough information for us to understand the significance of the event, but not a detailed physical description of the angel.