Question

Q.11 The sides of a triangle are 42 cm, 34 cm, 20 cm. Calculate its area using
Hero's formula
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Answer 1

Answer:

s = 42+34+20 =96/2= 48    

now using hero' s formulae

area =root under 48*6*14*28

        =root under 2*2*2*6*6*2*7*2*2*7

       =  now 2*2*2*6*7 =3360 cm ^2  ans

Step-by-step explanation:

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Answer 2

Answer:

Given,

a= 42 cm , b= 34 cm, c = 20cm

Semipermeter( s ) = a+b+c/2

semipermeter = 42+34+20/2

semipermeter = 96/2

semipermeter = 48 cm

By using HERON'S FORMULA ,

under root s (s - a)( s - b)( s - c)

under root 48 × 6 × 14 × 28

6×8×6×7×2×7×4

6²×2²×7²×4²

6×2×7×4

336

The area of the triangle is 336 cm.

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