Polygon: a closed plane figure with at least 3 sides.
12 sides = a dodecagon
11 - no name
Convex: diagonals on inside.
Concave: diagonals on outside.
Sum of Interior Angles: n-2(180)
y = 3x+2
Slope intercept form: y = mx=b
M = Slope = Rise over Run
Plot First Angle B = y intercept
M = 3, Y intercept (0,2).
M = 3 = 3 over 1.
If Slopes are the same - Parallel Lines
If Slopes are reciprocals - Perpendicular
If Slopes are none of the above, neither.
Are the lines Parallel, Perpendicular, or neither?
Example
Y=3x+4 M=3
Y=3x-2 M=3