How many triangles are there in figure PQRS? (Figure: rectangle PQRS with both diagonals meeting at centre O, plus one horizontal segment from the left side to O and one vertical segment from O down to the bottom side.)

उत्तर: (D) 12

• (A) चूक

  Wrong: overcounts; the extra segments add only 4 triangles.

• (B) चूक

  Wrong: undercounts the triangles made by the extra segments.

• (C) चूक

  Wrong: overcounts.

• (D) बरोबर

  Correct: diagonals give 8 triangles (4 small + 4 large); each extra segment splits one small triangle into 2, adding 4: total 12.