Two circles intersect at points A and B. If the angle ∠APB is 60°, what is the m

Practice Questions

Q1
Two circles intersect at points A and B. If the angle ∠APB is 60°, what is the measure of the angle ∠AOB, where O is the center of the circle?
  1. 30°
  2. 60°
  3. 120°
  4. 90°

Questions & Step-by-Step Solutions

Two circles intersect at points A and B. If the angle ∠APB is 60°, what is the measure of the angle ∠AOB, where O is the center of the circle?
  • Step 1: Identify the points involved in the problem. We have two circles that intersect at points A and B.
  • Step 2: Recognize that point P is a point on one of the circles, and we are given the angle ∠APB, which is 60°.
  • Step 3: Understand the relationship between the angle at the center of the circle (∠AOB) and the angle at the circumference (∠APB).
  • Step 4: Recall the rule that states the angle at the center (∠AOB) is twice the angle at the circumference (∠APB).
  • Step 5: Apply this rule: ∠AOB = 2 * ∠APB.
  • Step 6: Substitute the value of ∠APB into the equation: ∠AOB = 2 * 60°.
  • Step 7: Calculate the result: ∠AOB = 120°.
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