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A flag pole stands vertically. Two ropes of equal length run from the top of the pole to two pegs on the ground, both pegs being equidistant from the base.
The two triangles (pole, rope, ground) are congruent by which rule?

Class 9Criteria for CongruenceGeometry — Triangles
  • ARHS
  • BSSS only
  • CASA
  • DAAA

Step-by-Step Solution

Vertical pole gives right angles; equal ropes are equal hypotenuses; the common pole side is one equal side => RHS.
Answer: A) RHS

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