Odpowiedź:
p = [tex]\frac{7 + 7 + 10}{2}[/tex] = 12
p - a = 12 - 7 = 5
p - b =12 - 7 = 5
p - c = 12 - 10 = 2
Pole Δ
Szczegółowe wyjaśnienie:[tex]P = \sqrt{12*5*5*2}[/tex]
P = [tex]\sqrt{25*4*6}[/tex] = 5*2*√6 = 10√6
P = p*r
10√6 = 12*r
r = 10√6 : 12 = [tex]\frac{5\sqrt{6} }{6}[/tex] [ cm ]
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