Triangles - Properties and Congruence - Problems on Circles

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Q. If two circles have radii of 3 cm and 4 cm, what is the distance between their centers if they are externally tangent?
  • A. 1 cm
  • B. 7 cm
  • C. 12 cm
  • D. 1.5 cm
Q. If two triangles are congruent, which of the following is true?
  • A. They have the same area
  • B. They have the same perimeter
  • C. They have the same shape
  • D. All of the above
Q. What is the length of the hypotenuse of a right triangle with legs of length 3 cm and 4 cm?
  • A. 5 cm
  • B. 6 cm
  • C. 7 cm
  • D. 8 cm
Q. What is the radius of a circle if the area is 50π square units?
  • A. 5 units
  • B. 10 units
  • C. 25 units
  • D. 50 units
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