Find the area of triangle whose sides are 13 cm, 14 cm and 15 cm.
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Step-by-step explanation:
- Here, Let a=13cm ,b = 14cm and c =15 cm
- Now, Semiperimeter(s) = a+b+C/2=13+14+15/2 = 42/2 = 21cm
- Now, Area of triangle by herons formula =√s*(s-a)(s-b)(s-c)
- = √21*(21-13)(21-14)(21-15)
- = √21*8*7*6 = √7*3*2*2*2*7*3*2 =√7*7*3*3*2*2*2*2 = 7*3*2*2= 21*4 = 84 cm^2.
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