The figure below shows a triangular wooden frame abc. the side ad of the frame has rotted and needs to be replaced:

what is the length of the wood that is needed to replace ad?

The question has missing figure, the figure is in the attachment.

The length of wood needed to replace AD is .

Step-by-step explanation:

Given;

ABC is a triangle in which AB is of 12 inches in length.

∠DCB = 30°        ∠ACD = 15°

Solution,

In ΔABC,  BC=12 in

∠ACB = ∠DCB +  ∠ACD =

tan∠ACB =

Now in ΔDCB,

∠DCB = 30° and  BC=12 in

tan∠DCB =

Length of AD = Length of AB - Length of DB

Length of AD=

Thus  the length of wood needed to replace AD is .

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day