Question

find the value of x
exterior angle theorem: exterior = interior + interior ​

Answer 1

Answer:

180

Step-by-step explanation:

Answer 2

Answer:

149°

Step-by-step explanation:

let the remaining side of the triangle a,

now,

63°+86°+a=180°(sum of angles of a triangle)

149°+a=180°

a=180°-149°

a=51°

again,

x+a=180°(being linear pair)

x+51°=180°

x=180°-51°

•°•x=149°