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Sunita has a triangular scarf with sides 9 cm, 12 cm and 15 cm.
Is the corner between the 9 cm and 12 cm sides a right angle?

Class 7Pythagoras PropertyTriangles
  • AYes, it is a right angle
  • BNo, it is acute
  • CNo, it is obtuse
  • DCannot be decided

Step-by-Step Solution

. By the converse of Pythagoras the angle between the 9 and 12 sides is 90°.
Answer: A) Yes, it is a right angle

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