<span>21x+28=14
x= -2/3 or -0.666666666
</span><span>9x+12y=6
x=2/3 or .666666666
y=0</span>
Regular shape with six sides: That is a Hexagon
Sum of angles in a regular Polygon is: (n - 2)*180
Where n = Number of sides
For Hexagon, n = 6.
Sum = (n - 2)*180
= (6 - 2)*180 = 4 * 180 = 720°
