The number of ratios from students to adults would be a/s
Sector area can be found with the formula
where
is the central angle.
r = 8m ,
= 135º
m^2
Arc length formula is 
m
If you divide 21 by 7 you get 3 so you divide 27 by 3 to get 9 so the ratio 21 to 27 is equivalent to the ratio of 7 to 9
Answer:
20u-26
Step-by-step explanation:
To find the perimeter we have to add up all the sides
9u-6+u-7+9u-6+u-7
Combine light terms and we get
20u-26