text: # AB and CD are two equal chords of a circle with centre O such that ∠AOB = 80°, then ∠COD = ?
  
  Question:
  
  AB and CD are two equal chords of a circle with centre O such that AOB = 80°, then ∠COD = ?
  (a) 100°
  (b) 80°
  (c) 120°
  (d) 40°
  
  Solution:
  
  (b) 80°
  Given: AB = CD
  We know that equal chords of a circle subtend equal angles at the centre.
  ∴ ∠COD = ∠AOB = 80°
explanation: The document contains a math question and its corresponding answer. The question is about determining the measure of an angle subtended by an equal chord in a circle, and the answer is provided as 80°.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: # AB and CD are two equal chords of a circle with centre O such that ∠AOB = 80°, then ∠COD = ?
  
  Question:
  
  AB and CD are two equal chords of a circle with centre O such that AOB = 80°, then ∠COD = ?
  (a) 100°
  (b) 80°
  (c) 120°
  (d) 40°
  
  Solution:
  
  (b) 80°
  Given: AB = CD
  We know that equal chords of a circle subtend equal angles at the centre.
  ∴ ∠COD = ∠AOB = 80°
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document contains a math question and its corresponding answer. The question is about determining the measure of an angle subtended by an equal chord in a circle, and the answer is provided as 80°.
  
  Label: question-and-answer