find the area of a triangle whose sides measure 13 cm, Area, General Mathematics

Question:Find the area of a triangle whose sides measure 13 cm, 14 cm and 15 cm.

Answer Let a = 13, b = 14 and C = 15.

Then, s `= 1/2 (a + b + c) = 21`

:. (s - a) = 8, (s - b)

= 7 and (s - c) = 6

:. Area` = sqrt(s (s - a) (s - b) (s - c)`

  `= sqrt(21 xx 8 xx 7 xx 6)`

   `= 84 cm^2`

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Find the area of a triangle whose sides measure 13 cm, 14 cm and 15 cm.

Question:Find the area of a triangle whose sides measure 13 cm, 14 cm and 15 cm.

Answer Let a = 13, b = 14 and C = 15. Then, s `= 1/2 (a + b + c) = 21` :. (s - a) = 8, (s - b) = 7 and (s - c) = 6 :. Area` = sqrt(s (s - a) (s - b) (s - c)` `= sqrt(21 xx 8 xx 7 xx 6)` `= 84 cm^2`