3 years ago

Find the measure of the angle

Mathematics

1 answer:

Alik [6]3 years ago

6 0

Answer:

Step-by-step explanation:

We know that EA is a straight line(180) therefore

ang(ECD) = 180 - 115 = 65

The the sum of angles in a triangle is 180 as well therefore:

ang(DEC) = 180 - ang(EDC) - ang(ECD) = 180 - 40 - 65 = 75

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