vertical angles theorem

two column

alternate interior angles theorem

two column

same-side interior angles theorem/same-side exterior angles theorem

two column

converse of the alternate interior angles theorem

two column

converse of the same-side interior angles theorem

two column

supplements of the same angle are congruent/supplements of congruent angles are congruent

two column

complements of the same angle are congruent/complements of congruent angles are congruent

two column

triangle sum theorem

two column

triangle sum theorem (transformational approach)

transformation

exterior angle theorem for triangles

two column

sss postulate/theorem

informal two column proof (almost paragraph form)

aas theorem

two column

hl theorem

two column

asa postulate/theorem

paragraph

asa postulate/theorem

two column

why is there no ass theorem? (or ssa theorem)

paragraph/proof by contradiction/diagram (haha ass)

proving triangle congruence through transformations page 1

transformation

proving triangle congruence through transformations page 2

transformation

sum of interior angles of a polygon is 180(n-2)/each interior angle of a regular polygon is ^180(n-2)⁄_n

paragraph

sum of exterior angles of a polygon is 360/each exterior angle of a regular polygon is ³⁶⁰⁄_n

two column/paragraph

each central angle of a regular polygon is ³⁶⁰⁄_n

two column

number of diagonals of a convex polygon is ^n(n-3)⁄₂

paragraph

corresponding angles theorem

two column

diagonals of a parallelogram bisect each other

two column

opposite angles of a parallelogram are congruent

two column

opposite sides of a parallelogram are congruent

flow

adjacent angles of a parallelogram are supplementary

two column

dual perpendiculars theorem

two column

dual parallels theorem

two column

triangle inequality theorem

paragraph/proof by contradiction

isoceles triangle theorem

two column

angle bisector theorem

two column

converse of the isoceles triangle theorem

two column

perpendicular bisector theorem

two column

converse of the perpendicular bisector theorem

two column

pythagorean theorem method 1

paragraph

pythagorean theorem methods 2 and 3

paragraph

midsegment theorem for triangles

two column

midsegment theorem for trapezoids

flow

sas similarity theorem

two column

sss similarity theorem (page 1) (page 2)

two column

proving triangle similarity through transformations

transformation

similar right triangles theorem

two column

geometric mean theorems

two column

diagonals of a rhombus are perpendicular

two column

diagonals of a kite are perpendicular

two column

area formula for squares, kites, and rhombi: A = ^d1*d2⁄₂

two column