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allisonboggs85
24.05.2021 •
Mathematics
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Ответ:
x = 2
Step-by-step explanation:
-12 = -3x²
divide through by -3
-12/-3 = -3x²/-3
4 = x²
square root both sides
[4]^½ = x²× x^½
so therefore: 2 = x
Ответ:
Cada ángulo central tiene una medida de 40°.
Step-by-step explanation:
Un ángulo interno en un polígono regular comprende dos ángulos contiguos de igual medida de dos triángulos contiguos. Si el polígono regular tiene un ángulo interno de 140°, entonces cada triángulo tiene dos ángulos de 70°. El tercer ángulo corresponde al ángulo central. Por Geometría sabemos que la suma de las medidas de los ángulos internos de un triángulo es igual a 180°, entonces tenemos que la medida del ángulo central es:
Cada ángulo central tiene una medida de 40°.