What is the perimeter of the shaded triangle?

rectangle with adjacent sides labeled nine centimeters and twelve centimeters and a diagonal labeled fifteen centimeters. the diagonal divides the rectangle into 2 triangles. one triangle is shaded.

cm

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

3.4a=57.8 what is the the value of a

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.