tests for a parallelogram (1 Viewer)

[lillaila]

To prove smthng is a p.gram u can use one of the 4 tests but not the properties, but can u also use the definition of a p.gram? which is "a quad. with opp. sides parallel" (ie. both sides parallel) . This isn't in the 4 tests.

 

[spice girl]

idunno wot u're referring to there about the "4 tests".

You can use any of the below to prove a parallelogram:
* 2 pairs of opposite sides parallel
* 2 pairs of opposite sides equal
* one pair of opposite sides both equal and parallel
* diagonals bisect each other

 

[Rahul]

there is on more test:

*both pairs of opp angles are equal

 

[KeypadSDM]

Or any combination
say one pair of sides parallell and one set of opposite angles equal...

it's only a stones throw from all adjacant angles are supplementary...