Parallelograms – Part 2

Geometry

Chapter 6

A BowerPoint Presentation

Proving quadrilaterals are parallelograms

In a quadrilateral, if both pairs of opp sides are , then

(A repeat of the definition of parallelograms)

If AB CD and AC BD

Then ABCD is a

In a quadrilateral, if both pairs of opp sides are , then If AB CD and AD BC

Then ABCD is a

In a quadrilateral, if both pairs of opp s are , then

If A C and B D

Then ABCD is a

In a quadrilateral, if one pair of opp sides are both & , then

If AB DC and AB DC

Then ABCD is a

In a quadrilateral, if both diagonals bisect each other, then

If AM MC and BM MD

Then ABCD is a

In a quadrilateral, if one is supp to both of its consecutive s,

then If m A + m B = 180 and

m A +m D = 180

Then ABCD is a