Answer:
The greatest angle is 
Explanation:
According to angle sum property of a triangle, sum of all the angles of a triangle is equal to
°.
The given angles of a triangle are 
Therefore,
°
°
°

≈ 87.2°
≈ 71.8°
≈ 20.9°
Therefore, greatest angle is 
Answer:
All villagers were ranked by their abilities and level of skill.
Explanation:
After the hunting-gathering period, in the human history, people began to settle down. This transition of people from homes built for certain time to permanent settlements.
This transition era is known as Neolithic Revolution. This period also marked the beginning of human civilization and social stratification. People began to cultivate lands, domesticate animals, etc.
As the society begin to expand, social stratification became more divisive. People began to divide social class based on the resources they owned, their skills, and abilties.
Thus the correct answer is the first option.
Answer:
A star
Explanation: The sun is the brightest star in the solar system ,and is the only star that can be visible during the day.
The answer is that they arrived in Mesoamerica in the 13th century