Geometry
Rhombi
opp sides paraell opp sides congruent consecutiive angles are supplemontary diganols bisect each other All sides are congrurent Diagnaols aare congrurent diagnols bisect opposite angles
10 sides
decagon
12 sides
dodecagon
11 sides
hendecagon
7 sides
heptagon
6 sides
hexagon
9 sides
nonagon
interior angle therom
number of sides -2 * 180
8 sides
octagon
Parallelograms
opp sides paraell opp sides congruent consecutiive angles are supplemontary diganols bisect each other
Rectangles
opp sides paraell opp sides congruent consecutiive angles are supplemontary diganols bisect each other All right angles Diagnoals are congrurent
Circle permiter and area
2 * pie * radius , pie to radius the second
Trapezoids
NOn isocles trpazoids- only one pair of opposite sides are parall consecutive non base angles are supplemntatry Isosceles Trapzoids- only ONE pair of opposite sides are parallel Diagnaols are congrurent non parallel sides are congrurent opposite angles are supplementary base angles are congrurent midsegment is teh average of teh 2 bases
regular polygon
a convex polygon that is both equilangule and equilaterial
Permeiter
add all up
exterior
add up to 360
Equilangular polygon
all angles are congruent
Equilateral polygon
all the sides are congrurent
squares
opp sides paraell opp sides congruent consecutiive angles are supplemontary diganols bisect each other all right angles all sides are congrurent diagnols are perpendicular diagnoals are congrurent diagnoals bisect opposite angles
5 sides
pentagon
4 sides
quadrilateral
3 sides
triangle