Circumference 3160

In an isosceles triangle, the base length is 75% of the arm's length. Calculate the area of the triangle if the circumference is 22 cm.

Correct answer:

S =  22.2486 cm2

Step-by-step explanation:

o=22 cm p=75%=10075=43=0.75  a+b+c=o b=p a a=c a+b+c=22 b=0.75 a a=c  a+b+c=22 0.75ab=0 ac=0  Row20.75 Row1Row2 a+b+c=22 1.75b0.75c=16.5 ac=0  Row3Row1Row3 a+b+c=22 1.75b0.75c=16.5 b2c=22  Row31.751 Row2Row3 a+b+c=22 1.75b0.75c=16.5 1.571c=12.571  c=1.5714285712.57142857=8 b=1.7516.5+0.75c=1.7516.5+0.75 8=6 a=22bc=2268=8  a=8 b=6 c=8  h=a2(b/2)2=82(6/2)2=55 cm7.4162 cm  S=2b h=26 7.4162=3 55=22.2486 cm2



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