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30 votes
30 votes
In the diagram, m/ACB = 55°.

E
What is mZECD?
90°
O 55°
180°
D
O 125°
C
B
80

In the diagram, m/ACB = 55°. E What is mZECD? 90° O 55° 180° D O 125° C B 80-example-1
User Diegocr
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1 Answer

13 votes
13 votes

Answer:

55°

Explanation:

Angle ACB and angle ECD are alternate exterior angles and alternate angles have same angle measurements:

If angle ACB = 55°

then angle ECD is also = 55°

User Vicheanak
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