Today's temperature is 3 degrees warmer than yersterday's temperature t . write an expression for today's temperature
1 answer:
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Complete question is;
Which statements are true about the lines of symmetry of a regular pentagon? Check all that apply.
A) Every line connects two vertices.
B) Every line connects the midpoints of 2 sides.
C) Every line bisects a vertex angle.
D) Every line bisects a side.
E) Every line is perpendicular to a side.
Answer:
C: Every line bisects a vertex angle.
D: Every line bisects a side.
E: Every line is perpendicular to a side.
Step-by-step explanation:
A shape will have a line of symmetry when after the perpendicular line is drawn through from one vertex to the centre of one side, it can be folded and the folded part will sit perfectly on top in such a way that all the edges match.
Now, a pentagon has 5 sides and by implication from the explanation of line of symmetry above, it has 5 lines of symmetry.
Attached below is an image showing the 5 lines of symmetry of a pentagon.
From the attached image, we can see that the lines of symmetry bisects a vertex angle, it bisects a side and is perpendicular to a side.
Thus correct answer is Options C, D & E
Answer:
El ancho del río es 59.9 metros.
Step-by-step explanation:
El ancho del río lo podemos calcular con la siguiente relación trigonométrica asumiendo que la torre forma un triángulo rectángulo con el río:
En donde:
CA: es el cateto adyacente = Altura de la torre = 28.2 m
CO: es el cateto opuesto = ancho del río =?
θ: es el ángulo adyacente a CA
Dado que el ángulo de depresión (25.2°) está ubicado fuera de la parte superior de la hipotenusa del triángulo que forma la torre con la orilla opuesta del río, debemos calcular el ángulo interno (θ) como sigue:
Ahora, el ancho del río es:
Por lo tanto, el ancho del río es 59.9 metros.
Espero que te sea de utilidad!