One Atta Time Flash Cards Distance Learning Create New Sheet Select a Worksheet > Version 1 Version 2 Version 3 Version 4 Version 5 Version 6 Version 7 Version 8 Version 9 Version 10 Grab 'em All Finding Missing Side Length of Right Triangle (Area) Use the area formula for a right triangle to find a missing side length.Solve for the unknown base or height when the area and the other leg are given.