Question

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Use the diagram to complete the statement.
m∠ECF=

Answer 1

37°

Explanation:

Angle ECF is vertical to angle ACG, so has the same measure. Angle ACG is the second acute angle in right triangle ACG, so is complemetary to angle CAG. It has measure ...

∠ECF = ∠ACG = 90° -∠CAG = 90° -53°

∠ECF = 37°