Find the value of x, i know that this is supposed to be really easy, but i kinda don't don't get it

the angle for a straight line is 180°. since the question gave you 100°, this means the other angle to complete the straight line is 80°. you know, 100°- 80°. then, the type of angle is corresponding angle. meaning ; the 80° angle is the same as (x+10)°. hence, to find the value of x, form an equation.

Solution:

(x + 10)° = 80°

x = 80° - 10°

x = 70°

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

hope it will

#faazmessi