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P = π*r^2*α/360
P = π*2*30/360
P = π*1/6
P= π/6
b)
P = π*r^2*α/360
P = π*9*45/360
P = π*9/8
P = 9π/8
α=30°
r=√2cm
P=α/360° * πr²
P=30°/360° * π√2²
P=1/12 * 2π
P=1/6π[cm²]
Odp.Pole wycinka kołowego wynosi 1/6π cm².
b)
α=45°
r=3cm
P=α/360° * πr²
P=45°/360° * π3²
P=1/8 * 9π
P=1/8 * 9π
P=9/8π[cm₂]
Odp.Pole wycinka kołowego wynosi 9/8π cm².