Area of Regular Polygons
need help finding the area of these two questions thanks

Can someone tell me if this is perpendicular? !

Someone me i need with this stuff

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.