Find the area and perimeter of a 30-gon with a radius of 1

Here :D

Step-by-step explanation:

look at one of the 30 central triangles.

Each will be isosceles with a vertex angle of 12°

base^2 = 1^2 + 1^2 - 2(1)(1)cos12°

= 2 - 2cos12°

so the perimeter is 30(2 - 2cos12°)

= 60 - 60cos12°

use your calculator if you need a decimal answer.

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9