bougiehairstudios
11.02.2020 •
Mathematics
10. Stefi mobiltelefon-költségeinek fedezésére feltöltőkártyát szokott vásárolni. A mobiltársasag ebben az esetben sem
előfizetési díjat, sem hívásonkénti kapcsolási díjat nem számol fel. Csúcsidőben a percdíj 25 forinttal drágább, mint
csúcsidon kivül. Stefi az elmúlt négy hétben összesen 2 órát telefonált és 4000 Ft-ot használt fel kártyája egyenlegebol
úgy, hogy ugyanannyi pénzt költött csúcsidőn belüli, mint csúcsidőn kívüli beszélgetésekre. Hány percet beszélt Stefi
mobiltelefonján csúcsidőben az elmúlt négy hétben?
Solved
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Ответ:
x = 33°
Step-by-step explanation:
From the figure attached,
FB and FC are two secants intersecting each other at point F outside the circle.
Measure of angles between the secants measures half of the difference between the intercepted arcs.
x° =
x° =
x = 33°