Characteristics of Parallelograms

These simple quadrilaterals are so cool that some people break the law just to measure them. We're guessing that homework problems will help you get your fix.

 Geometry Quadrilaterals Language English Language

Transcript

00:24

composed of two sets of parallel line segments a line segments opposite each

00:29

other are congruent or have the same length all right looks good but what

00:34

about the angles a parallelograms opposite angles are congruent and [Angles marked on parallelogram]

00:38

consecutive angles are supplementary which means they add to 180 degrees this

00:44

building has one pair of opposite angles measuring 50 degrees and the other pair

00:49

measuring 130 degrees which means the pair of opposite angles are congruent

00:53

and 50 plus 130 is 180 degrees so consecutive angles are supplementary

00:58

we're good on angles too as final check of parallelograms diagonal should bisect

01:04

each other or divide each other into halves [Lines dividing parallelogram]

01:07

now we've ringed two ropes to connect opposite corners and we hope to measure

01:11

the bisect it has before the police arrived [Boat driving in the river]

01:16

okay so it looks like one of our diagonals is separated into four and

01:20

four and the other diagonal is separated into five and five looks like they're in

01:25

halves or bisected diagonals that bisect each other yep check so that's our

01:30

report on the geometric validity of the dockland building take down the ropes [Helicopter removes ropes from dockland building]

01:35

hurry up and we best conclude this segment of program okay we're out of

01:40

here goodnight and good news briefs [Policeman appears and news reporter runs away]