GCE Mathematics 2022 Objective — Question 36
Question 36 of 50 from the General Certificate of Education (GCE) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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The diagram shows triangle MNR inscribed in a circle and PQ is a tangent line. If angle MRN=41 degrees and angle PMR=141 degrees, find angle QNR.
- A. 39 degrees
- B. 80 degreesCorrect
- C. 110 degrees
- D. 141 degrees
Explanation
angle PMR = angle MRN + angle RNM (exterior angle equals sum of two opposite interior angles): 141=41+RNM, so RNM=100 degrees. RNM+QNR=180 (angles on a straight line): 100+QNR=180, so QNR=80 degrees.
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