The sum of the measures of the interior angles of a polygon of n sides is
180(n - 2)
If the polygon is regular, all angles are congruent, and each angle measures
[180(n - 2)]/n
Set the measure of one angle equal to 140, and solve for n, the number of sides.
[180(n - 2)]/n = 140
180(n - 2) = 140n
180n - 360 = 140n
40n = 360
n = 9
The number of sides is 9.
Do you mean 15 feet across in diameter? would be pi x r^2
so 3.14 x 7.5^2 = 176.625 feet^2
Answer:
Step-by-step explanation:
The salary per year is the combination of the $42000 per year (constant) plus the 2% rise per year. So the ecuation is:
Firt year
Second year
Generalizing:
Answer:
Frequency table
2,4,5,5,5,6,7,8,9,9,10,11,12,15
$240
Since a square yard is 3ft x 3ft, a square yard is equal to 9 square feet. Dividing 180 square feet by 9 square feet, we find that the room is 20 square yards.
Since carpet is $12 per square yard, and we have 20 square yards to cover, by multiplying 20 by $12, we find that the room will cost $240 to cover.