Find the area of a pentagon with a side length of 7

What are the values of each variable in the diagram below?

Common binomial factor of 6x(3x+7)+5(3x+7)

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.