Question

solve it plzz chapter Triangle​

Answer 1

Answer:

Step-by-step explanation:

lLet A, B and C be 3x, 2x and x respectively.

3x +2x +x = 180o     (angle sum of )

6x = 180o x = 30

      A = 90o, B = 60o and ACB =30o

Now, ACB + ACE + ECD = 180o (angles on a straight line)

30o + 90o + ECD = 180o

ECD = 180o – 120o = 60o

Hence, ECD = 60o