Question

tell me the answer I will mark the correct answer as brainlist​

Answer 1

Answer:

single total angles of triangle is 180°

A +B+C = 180

80 + 30+ C =180

110+C = 180

ACB = 70°

now BCD is a straight line so 180°

ACB + ACE + ECD = 180

70+ x+ 90 =180

x = 20°

Answer 2

Given:

ABC is a triangle

Angle A = 80°

Angle B = 30°

Angle C = 90°

$By \: \: Exterior \: \: angle \: \:property$

$A°+ B° = 90° + x \\80° + 30° = 90° + x \\ 110° = 90° + x \\ x = 110° - 90° \\ x = 20°$

....hope it's helpful :)