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Triangles on the same base BC and between the same parallels have equal areas. Anu claims two such triangles must also have equal perimeters. Anu is:

Class 9Areas — Figures on the Same BaseGeometry
  • Awrong; perimeters can differ
  • Bright; perimeters are equal
  • Cright only for right triangles
  • Dright only if isosceles

Step-by-Step Solution

Equal area on the same base only fixes the height; the apex can slide along the parallel, changing the slant sides and hence the perimeter.
Answer: A) wrong; perimeters can differ

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