Consider the isosceles triangle shown below. (3x-10)
(OL-X6)
(4y-20) units
(5x+30)
(6x+20)'
Use what you know about triangles and angle relationships to determine
the value of x

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters