9.2 Areas

All Questions
Area of a triangle when all the three sides are given is:

  <math><mfrac><mn>1</mn><mn>2</mn></mfrac><mi>b</mi><mi>h</mi></math>
  bh
  <math><msqrt><mi>s</mi><mo>(</mo><mi>s</mi><mo>-</mo><mi>a</mi><mo>)</mo><mo>(</mo><mi>s</mi><mo>-</mo><mi>b</mi><mo>)</mo><mo>(</mo><mi>s</mi><mo>-</mo><mi>c</mi><mo>)</mo></msqrt></math>
  <math><mfrac><mrow><mi>a</mi><mo>+</mo><mi>b</mi><mo>+</mo><mi>c</mi></mrow><mn>2</mn></mfrac></math>