Răspuns :
d = 2r = 24,8 => r = 24,8/2 = 12,4 cm
Conform Teoremei de 30° => BC = 2AC
AC = 3,(4) = (34-3)/9 = 31/9 dm
BC = 2×31/9 = 62/9 dm
A + B + C = 180° } => A = 180° - 2×70°30' = 180° - 141° = 39°
B = C = 70°30'
d = 2r = 24,8 => r = 24,8/2 = 12,4 cm
Conform Teoremei de 30° => BC = 2AC
AC = 3,(4) = (34-3)/9 = 31/9 dm
BC = 2×31/9 = 62/9 dm
A + B + C = 180° } => A = 180° - 2×70°30' = 180° - 141° = 39°
B = C = 70°30'