Question 21The length of the hypotenuse of a right triangle is $h,$ and the radius of the inscribed circle is $r.$ The ratio of the area of the circle to the area of the triangle is$\frac{\pi r}{h+2r}$$\frac{\pi r}{h+r}$$\frac{\pi r}{2h+r}$$\frac{\pi r^2}{h^2+r^2}$none of these