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l = 3π cm
3π - 90°
2πr = 12π-360°
r = 6 cm
Pw = ¼ 6²
Pw = 9π
Odp. Pole wycinka koła wynosi 9π .
zad.2
r = 6
Przyprostokątna trójkąta - 6-2 = 4
sinα = 2/4
sinα = ½
α = 30⁰
Kąt - 60⁰
Pw =⅙ π r²
P = ⅙ π 6²
P = ⅙ π 36
P = 6 π cm² ;)