The midfielder set up Juventus’ Lina Hurtig for the game’s winning goal ten minutes from time in front of a sell-out 14,500 crowd in Gothenburg.
The victory extended the Swedes’ lead at the top of European Group A to six points, with the visitors their closest rivals at the start of play.
Angeldahl and co. took the lead just after the 10-minute mark when Fridolina Rolfo convincingly slotted home after being threaded through by Lina Hurtig.
But the Olympic silver medallists were pegged back on the half hour when Linda Sallstrom levelled affairs for the Finns.
The hosts were instantly on the front foot as they looked to regain their lead, registering 15 shots in comparison to Finland’s five over the course of the 90 minutes.
And they were eventually rewarded for those efforts when Angeldahl lofted a sumptuous ball over the visiting defence and into the path of Hurtig to grab the game’s decisive goal.
Sweden are back in World Cup qualifying action on Tuesday 30 November when they play host to Slovakia.