A spotlight shines a on a screen; between them is an obstruction that casts a shadow. suppose the screen is vertical, 20m wide by 15m high, and 50 m...

A spotlight shines a on a screen; between them is an obstruction that casts a shadow. suppose the screen is vertical, 20m wide by 15m high, and 50 m from the spotlight. Also, suppose the obstruction is a square, 1m on a side, and is parallel to the screen. Express the area of the shadow as a function of the distance from the light to the obstruction.