Answer:
Triangle A B C is reflected across B C and then is rotated about point C to form triangle D E C.
Step-by-step explanation:
1) Since SSS Postulate states that if the three sides of one triangle has the same measure of another triangle then both triangle are congruent. The consequence of this Postulate, is that these triangles have respectively the same angles.
2) Notice below both triangles SSS, an example, in this case an isosceles triangle, firstly reflected (grey one ) then rotated by poir C.
