Circles 2

Calculate the area bounded by the circumscribed and inscribed circle in triangle with sides 12 cm, 14 cm, 18 cm.

Correct result:

S =  209.4 cm2

Solution:

s=12+14+182=22 cm S1=22(2212)(2214)(2218)=83.9 cm2 ρ=S1s=3.81 cm r=abc4S1=121418483.9=9.01 cm  S=π(r2ρ2)=209.4 cm2



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