Okay, the user wants me to translate "quarter-circle" into Swedish. Let me think. The term "quarter-circle" refers to a quarter of a circle, which in geometry is a 90-degree arc. In Swedish, "quarter" is "kvart" and "circle" is "cirkel". So combining them, it should be "kvartscirkel". I need to make sure there's no existing Swedish term that's different. Maybe check if "kvartscirkel" is the standard term. Alternatively, sometimes Swedish uses "fjärdedelscirkel" for a quarter-circle, but "kvartscirkel" seems more direct. I'll go with "kvartscirkel" as the translation.