Isabella1319
04.12.2020 •
Mathematics
Rozwią2 zadanie.
a) W trójkącie równoramiennym ABC ramiona AC I BC tworzą kąt 100º. Ob-
licz miarę kąta rozwartego, jaki tworzą dwusieczne kątów przy podstawie
tego trójkąta.
с
100°
D
y = ?
B
B
B
Obliczamy kąt przy podstawie trójkąta, korzystając z twierdzenia o sumie
kątów trójkąta i z własności trójkąta równoramiennego.
B =(180° - ): 2 = 1
Wobec tego kąt DAB jest równy
oraz kąt DBA
jest równy
Obliczamy kąt y, korzystając z sumy kątów trójkąta ABD.
Y =
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Ответ:
Yes
no
no
Step-by-step explanation:
…………………