En una Escuela de Nivel Superior, se desea realizar una investigación sobre los alumnos inscritos en primer y segundo años, para la cual se aplicará un cuestionario de manera aleatoria a una maestra, pues los recursos económicos y el tiempo para procesar la información resultaría insuficiente en el caso de aplicársele a la población estudiantil completa. Se considerara una confianza del 95% un porcentaje de error del 5%.

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statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.

the answer would be a.

step-by-step explanation:

because of the opposites between not