Respuesta :

MathPhys

Answer:

a) 50

Step-by-step explanation:

The angle formed by two chords is the average of the arc angles.

7x = (5x + 90) / 2

14x = 5x + 90

9x = 90

x = 10

So the measure of arc EC is 5x = 50°.

khuranashilpa76

The measure of arc EC is  a) 50

What is the angle of a complete circle?

The angle of a complete circle is 360°

The angle formed by two chords angle= arc/radius

  ⇒7x = (5x + 90) / 2

  ⇒14x = 5x + 90

  ⇒ 9x = 90

  ⇒x = 10

So the arc EC is 5x = 50°.

Learn more about angle here:-https://brainly.com/question/25716982

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