Can someone help me figure out what goes in the blank squares

Triangle dog was rotated to create triangle d'o'g'. describe the transformation using details and degrees. (10 points)

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why