The area of an regular octagonal is 420sq meters if the apothem 7 meters find the perimeter of the polygon

the f

last graph i believe

step-by-step explanation:

worked it out i believe

the first one, all those points on the line just make a strait line.

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

answer: dead jah

step-by-step explanation:

bullet + jah= dead jah