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APMOPS 2008 Question 9

APMOPS · APMOPS 2008

Question 9

In triangle $PQR$, $PQ=6$ cm, $PR=4$ cm and $QR=6$ cm. If $PQ$ and $PR$ are tripled while $QR$ is unchanged, which statement is correct?
  1. (1) The area is tripled.
  2. (2) The area increases by 9 times.
  3. (3) The altitude is tripled.
  4. (4) The area decreases to 0 cm².
  5. (5) None of the above.