Zad.5
Pole wycinka koła o promieniu 3 wynosi 3 pi. Wyznacz kat alfa
P=α/₃₆₀°·πr²
3π=α/₃₆₀°·π·3²
3π=(9α:360π)
3π=¹/₄₀απ /:π
3=¹/₄₀ α
α=3:¹/₄₀=3·40=120
α=120°
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P=α/₃₆₀°·πr²
3π=α/₃₆₀°·π·3²
3π=(9α:360π)
3π=¹/₄₀απ /:π
3=¹/₄₀ α
α=3:¹/₄₀=3·40=120
α=120°