For triangle tri the following facts are given: segment an // segment ri at= 8 cm ar= 2 cm tn = 12 cm a) assume triangle tan is the image of triangle tri under a dilation. is the dilation an expansion or a contraction? b) what is the scale factor? c)use the side-splitting theorem to find ni.

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