The base, height, and the area are calculated from the oblique side and the angle of the right-angled triangle.
When the oblique side and the angle are input and "Calculate the base, height, and the area" button is clicked, the base, height, and the area of the input right-angled triangle are displayed.




Right-angled triangle whose oblique side c is 1, and angle θ is 30°
Base a: 0.86602540378444Height b: 0.5
Area S: 0.21650635094611