Question

Please tell proper answer

Answer 1

we know the sum of three,

angle =180⁰

120⁰+50⁰+x=180⁰

170⁰+x=180⁰

x=180⁰-170⁰=10⁰

here x value given -20

then,-20⁰-10⁰=10⁰

then x =10⁰

now,120⁰+50⁰+10⁰=180⁰ans