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MaRussiya [10]
3 years ago
10

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

Mathematics
1 answer:
alexdok [17]3 years ago
5 0

Answer:

36.86989765

Step-by-step explanation:

As Angle GBC = Angle CDF = 45, so CF = CD as it is an isosceles right triangle  , then as sin(45) = 1/root(2), so CF = 12, then tan(angle ECF) = FE/CF = 9/12, then angle ECF = tan^-1 (9/12) = 36.86989765.

If it is helpful, plz give me Brainliest.

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Given:

The three exterior angles of a pentagon measures 60,80 and 90.

To find:

The measure of other two exterior angle, assuming them equally.

Solution:

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Divide both sides by 2.

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