area of equilateral triangle whoseperimeter is 180 cm
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Hence it is equilateral triangle,so
a=b=c
Perimeter of triangle=180
a+b+c=180
a+a+a=180
3a=180
a=180/3
a= 60
a=b=c=60
s= a+b+c/2
60+60+60/2
180/2
90
ar ∆ = √s(s-a)(s-b)(s-c)
√90(90-60)(90-60)(90-60)
√90×30×30×30
√3×3×10×3×10×3×10×3×10
√(3×3)(3×3)(10×10)(10×10)×3
3×3×10×10√3
900√3
a=b=c
Perimeter of triangle=180
a+b+c=180
a+a+a=180
3a=180
a=180/3
a= 60
a=b=c=60
s= a+b+c/2
60+60+60/2
180/2
90
ar ∆ = √s(s-a)(s-b)(s-c)
√90(90-60)(90-60)(90-60)
√90×30×30×30
√3×3×10×3×10×3×10×3×10
√(3×3)(3×3)(10×10)(10×10)×3
3×3×10×10√3
900√3
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