an automatic progression consists of 37 terms the sum of the first three term of its 12 and the nature and the sum of its last three terms is 318 then find the first last term of the progression​

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.