Question

explain with proper steps

Answer 1

y : z

=3 : 7

=> 3x + 7x = 180

=> 10x = 180

=> x = 18

3x = 3*18 = 54 => y°= 54

No need of z, we need just y

x + y = 180

x = 180 - y

x = 180 - 54

x = 126°

So, answer is (4) 126°

Hope this helped