Bro hazel, kris, trey, Eli, sowwy help

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?