As shown in the figure, in square ABCD, ab = 3, points E and F are on BC and CD respectively, and ∠ BAE = 30 ° and ∠ DAF = 15 ° to calculate the area of △ AEF

As shown in the figure, in square ABCD, ab = 3, points E and F are on BC and CD respectively, and ∠ BAE = 30 ° and ∠ DAF = 15 ° to calculate the area of △ AEF

The △ ADF will rotate 90 ° clockwise around a point a, and rotate 90 ° clockwise around a point a, and then turn 90 ° to the location of △ ABG, \\\\pointa, and \\pointa, and then \\\pointa, and rotate 90 ° 90 ° clockwise around a point a, and then \\\\\\\\\\\\95; Ag = AF, \\\\\\\\\\\\\\\\\\\it's not easy+ 60°）=60°，EC=BC-BE=3-1，EF=2（3-1），∴EG=2（3-1），S△AEG=12EG•AB=3-3，∴S△AEF=S△AEG=3-3．