RectF area = new RectF(0, 0, 100, 100);
RectF bounds = new RectF();

Path first = new Path();
first.arcTo(area, 45, 135);

Path second = new Path();
second.arcTo(area, 90, 90);

first.computeBounds(bounds, false);
bounds.height();    // = 70.71068
                    // RectF(0.0, 50.0, 85.35534, 120.71068)

second.computeBounds(bounds, false);
bounds.height();    // = 50.0
                    // RectF(0.0, 50.0, 50.0, 100.0)