Each side of a regular octagon has a length of 3 meters. what is the perimeter of the octagon?

Aformual for 8 bottles of window cleaner calls for 6 cups of rubbing to customers alcohol 2 1/4 gallons of water and 1 1/2 cups of ammonia alcohol would the forula call if a factory made 1,280 bottles for stores to sell to customers

Acircle has a circumference of 28.36 units what is the diameter of the circle

Can someone tell me if this is perpendicular? !