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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.
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
Full 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]
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