Realated Questions

In the above triangle ABC, find the coordinates of the foot of the perpendicular drawn from B to AC.
Find out the number of ways in which 6 rings of different types can be worn in 3 fingers?
In the figure below, the rectangle at the corner measures 10 cm 20 cm. The corner A of the rectangle is also a point on the circumference of the circle. What is the radius of the circle in cm?