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A right-angled triangle has a perimeter of 30 cm and an area of . What is the length of its hypotenuse?

Competition practiceGeometry
  • A13 cm
  • B12 cm
  • C15 cm
  • D17 cm

Step-by-Step Solution

Let the legs be a, and the hypotenuse . Then and . Since , so and cm (the triangle is 5, 12, 13).
Answer: A) 13 cm

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