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Si la circunferencia completa 360º corresponde a 78 cm. de longitud
Un arco de 50º corresponde a "x" cm.
x = 78 · 50 / 360 = 10,83 cm.
Saludos.
Area corona =
r1 > r2
Del enunciado:
r1 = 100 mm
r2 = 7 cm = 70 mm
Area corona =
=
3)
Area total tarta =
Area cada parte =
=
=