Answer: [tex]20^{0}[/tex]
Step-by-step explanation:
Two angles are said to be complementary if they sum up to be [tex]90^{0}[/tex] .
Their ratio is given to be 2: 7 , that is
2x + 7x = 90
9x = 90
x = 10 Therefore : the measure of R is 2x , which is 2 x 10 = [tex]20^{0}[/tex]
