In the given diagram, we have line AE intersecting line DB at point C, forming a right angle at the intersection. Ray CF extends from line DB at point C within angle ECB.
To determine which set of angles are complementary, we need to identify two angles that add up to 90 degrees (a right angle).
In this case, angle ECB and the right angle at the intersection of AE and DB are complementary. They form a pair of angles that, when combined, add up to 90 degrees.
So, the set of angles that are complementary in this diagram is angle ECB and the right angle at the intersection of AE and DB.
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