Answer:
whats the question
Step-by-step explanation:
The square miles that was burned if one square mile is 640 acres is 840.625 square miles.
<h3>What does division mean?</h3>
Division is the process of grouping a number into equal parts using another number. The sign used to denote division is ÷. Division is one of the basic mathematical operations.
<h3>How many square miles was burned?</h3>
Square miles that was burned = 538,000 / 640 = 840.625 square miles
To learn more about division, please check: brainly.com/question/13281206
In any polygon with number of sides = n, the sum of measures of its internal angles is equal to (n-2)*180
Now, for a nonagon:
number of sides = 9
sum of internal angles = (9-2)*180 = 1260 degrees
We are given the measures of seven of its angles and we know that the other two are equal. Assume that each angle of the remaining two angles has a measurements = x degrees
Therefore:
sum of angles = 138 + <span>154 + 145 + 132 + 128 + 147 + 130 + x + x
1260 = 974 + 2x
2x = 1260 - 974
2x = 286
x = 143 degrees
Based on the above calculations:
The measure of each angle of the remaining two angles is 143 degrees</span>