Can someone please help on this question

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

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%