Draw and label a quadrilateral that could not be

Ответ:

jada4020

01.01.2022

The labeled drawing is in the attached file.

The figure is a quadrilateral, because it has four sides.

It is not a parallelogram because in a parallelogram,
every side is parallel to the one across from it, but
in this figure, nothing is parallel to anything.

Draw and label a quadrilateral that could not be classified as a parallelogram. explain why it can't

Draw and label a quadrilateral that could not be classified as a parallelogram. explain why it can't

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Ответ:

21shuldrak

04.01.2021

Mathematics

62.2

Step-by-step explanation:

Hello There!

we need to find the missing angle using law of cosines

The law of cosines formula for finding an angle is

$cosC=\frac{a^2+b^2-c^2}{2ab}$

Important note: c^2 = opposite side of missing angle

so we are given all of the measurements so all we need to do is plug in the values

$cosX=\frac{19^2+30^2-27^2}{2(19)(30)} \\19^2=361\\30^2=900\\27^2=729\\\\900+361-1261\\1261-729=532\\2(19)(30)=1140\\\frac{532}{1140} =.4666666667\\cosX=.4666666667$

so our last step would be to isolate the variable (x)

to do so we take the inverse of cos -^1(arccos) and multiply that by each side

$X=arccos(.4666666667)\\X=62.18186071$

then we would round to the nearest tenth and get that x = 62.2

Can someone help me with #2
I need a specific explanation.

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Draw and label a quadrilateral that could not be classified as a parallelogram. explain why it can't be classified as a parallelogram.

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