Notes

Sum of interior angles of polygons= 180 x (n-2)
Each Interior of a polygon = 180x (n-2) /n
Each exterior angle of a polygon= 360/n
Parallelograms have opposite sides which are congruent, opposite angles that are congruent, supplementary consecutive angles, and diagonals that bisect each other
Rectangle has all right angles
Rhombus has all congruent sides
Square has right angles and congruent sides, diagonals go straight through right angles
Base angles of Trapezoids are congruent, diagonals are also congruent
To find mid segment of a Trapezoid, add the two other segments (on top and bottom) and divide them by 2
Diagonals of a kite are always perpendicular and the kite always has one pair of opposite congruent angles which are formed by non congruent sides
a and d are extremes (a and d are extreme while b and c are just mean)
b and c are means
cross products property (ad=bc)
interchange means or extremes (a/b = c/d --> a/c = b/d)
reciprocal property (a/b = c/d --> b/a = d/c)
addition or subtraction property (a/b = c/d --> a+-b/b = c+-d/d)
study triangle similarity theorems, geometric means, right triangle similarity theorem, altitude and leg theorem, tan sin and cos as ratios, angles of elevation and depression,
segments of secants, tangents, intersecting chords, angle relationships in circles, inscribed angles and polygons, chord theorems, (x-h)2 + (y-k)2, how to find arc measures, how to find perimeters and areas of all shapes, how to find circumference and area of sectors, arc lengths, and circles, how to find surface area and volume of shapes, how to find ratio of volume and surface area of similar solids, and all of unit 13.

Good luck getting anything above an 85 stupid.