Question

Find the find the area of a triangle whose sides are 13 14 and 15 centimetre

Answer 1

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here is your answer..

Answer 2

Answer:

⇒ 84 cm²

Step-by-step explanation:

If a, b, c are the sides of a triangle and s is the same perimeter, than its area is given by ;

$Area = \sqrt{s(s - a)(s - b)(s - c)}$

Here, a = 13, b = 14 & c = 15

Therefore,

⇒ s = 1/2 ( a + b + c )

⇒ 1/2 ( 13 + 14 + 15 )

⇒ 21

$Area = \sqrt{21(21 - 13)(21 - 14)(21 - 15)}$

$Area = \sqrt{21× 8 × 7 × 6}$

$Area = \sqrt{7 × 3 × 8 × 7 × 2 × 3}$

Area =( 7² × 4² × 3²)^1/2

Area = 7 × 4 × 3

Area = 84 cm²