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Quadrilaterals Videos 12 videos

Characteristics of Parallelograms
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Characteristics of Parallelograms 12484 Views


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Description:

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.

Language:
English Language

Transcript

00:03

characteristics of parallelograms a la shmoop

00:06

it's been said that the dockland office building in Hamburg looks like a [Man discussing dockland building]

00:10

parallelogram leaning out over the Elbe River but is it really a parallelogram

00:15

our crack team investigates as we bring you this riveting story let's look at [Breaking news story of dockland building]

00:20

the characteristics of a parallelogram a parallelogram is a quadrilateral

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]

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