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Three angles of a quadrilateral are equal and the measure of fourth angle is 120°. What  is the measure of each of the equal angle?
  • a)
    40°
  • b)
    60°
  • c)
    80°
  • d)
    90°
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Three angles of a quadrilateral are equal and the measure of fourth an...
Let the angle be x.
∴ x + x + x + 120° = 360°
⇒ 3x = 240° ⇒ x = 80°
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Most Upvoted Answer
Three angles of a quadrilateral are equal and the measure of fourth an...
If three angles of a quadrilateral are equal, then their measure would be equal to (360 - 120) / 3 = 80 degrees.

So, the three equal angles would each measure 80 degrees, and the fourth angle would measure 120 degrees.
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