BEAVER CREEK, Colo. — Fresh off her third-place finish in Tuesday’s super-G and gearing up for Friday’s downhill, Lindsey Vonn announced that she would also compete in the next week’s super combined and the giant slalom at the alpine world ski championships.

The announcement came as a surprise because Vonn has not competed in a giant slalom or super combined event in more than two years. Her last giant slalom race was in January 2013 in Maribor, Slovenia, an event she won. In December 2012, she was disqualified from her last race in the super combined — which features one downhill leg and one slalom leg — after failing to complete the slalom. While Vonn is the most dominant skier in women’s World Cup history, she has struggled with the slalom in recent years.

“I’m going to wing it,” Vonn said Wednesday. “I’ve done slalom my whole life. I don’t know how fast I’ll be, but I’ll for sure be able to do it.”

She added, “I haven’t skied slalom in 21/2 years, so after the downhill race on Friday, I’m going to take a couple of days to train some slalom.”

With her third-place finish Tuesday, Vonn won her sixth career world championship medal, edging her teammates Bode Miller and Julia Mancuso, who each have five, to become the American skier with the most world championship hardware.

“I’m not focused on records or anything else,” Vonn said. “I’m just focused on skiing my best and winning as many races as I can.”

Vonn is looking for a victory in Friday’s downhill, her best event.

“For the downhill,” she said, “I’m going to change my plan of attack a little and make sure I’m going on the absolute limit. I think that’s what it’s going to take to win.”