Question

Sides of a triangle are 70cm,80cm and 90cm. Find its area. (use root 5 = 2.23)

Answer 1

semi perimeter=s=70+80+90/2=120area=root s(s-a)(s-b)(s-c)=root 120(120-70)(120-80)(120-90)= root 120*50*40*30=root 3*4*10*5*10*4*10*3*10=root 3^2* 10^2*10^2*4^2*5=3*10*10*4*root5=1200*root5=1200*2.23=2676cm^2
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Answer 2

Area of triangle = 2676 cm^2
By using herons formula
√s(s-a)(s-b)(s-c)
where s is semi perimeter and
a, b, c are sides of triangle
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