An irregular polygon with 4 sides is shown. select the equation that can be used to find the side length, d, given the perimeter, p , and other three sides. a d=p−a−b+c b d=p−a−b−c c d=p/a−b−c d d=p−a+b+c

We know that the sum of the lengths of the sides of a polygon is the perimeter of the polygon, by definition.

Thus, in our case of four sided polygon with the side lengths as a,b,c and d and the perimeter as P, we can write the equation of the perimeter to be as:

Thus, if we have to find the side length, d, given the perimeter, P , and other three sides a,b and c, then we will have to isolate the d in the above equation by subtracting a+b+c from both sides. We will get:

Thus, the the equation that can be used to find the side length, d is:

From the given list Option B is the correct option.

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

answer: i think it is (1,-2)