Pls solve this question ....
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Answered by
1
Step-by-step explanation:
angle sum property of a triangle...
x+2x+3x=180
x=30
also bc is a straight line...
then
x+90+angleECD =180
angle ECD=180-120
=60
Answered by
1
Answer:
60
Step-by-step explanation:
3x + 2x + x =. 180
6x =180
x = 30
x + 90 + ECO = 180
30 +90+ECO = 180
ECO = 180-120
ECO = 60
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