Could someone explain how to find the area of this parallelogram?

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bump

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please lads

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>>218992
The area?

It's always base*height, and you're given those:

base=9.8
height=5.6
area=9.8*5.6=54.88

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>>219004
thats what I've been doing, it shows as wrong which is why im so confused.

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any more ideas?

>>218992
>>219008

I just want to point that h refers to the length of the dotted line inside the parallelogram, not the area. Is this picture from another question?

Jesus Christ, op.
I was doing stuff like this when I was 12

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>>219019
not sure, they are all meshed together in one lesson block.
>>219020
pls stop

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>>219015
You're aware that the image isn't actually asking you to find the area, right?

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>>219024
>>219019
the lesson video did not explain how to do this

>>219031

Because it's piss easy stuff that you can do if you know the basic shit about triangles. I don't know how to do it but I'm sure I could if I thought about it for a minute. Use your brain.

>>219033
quit ripping on the poor guy for god's sake. if you actually did know how to do these kinds of problems, you would realize this one isn't an easy one, faggot.

>>219034

>you would realize this one isn't an easy one, faggot.

I just thought about it for 30 seconds and figured it out, it's definitely easy.

>>219039

>it's definitely easy.

Then by all means, show us how, Mr. Genius.

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>>219039
>>219034
please explain how to do it

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>>219033
Okay, for giggles, I'ma find the value of h for you.

Now, AB and EC are parallel (because it's a para-fucking-lelogram), so the "Z" rule tells us that ECA and CAB are the same.

Now, trigonometry* tells us that there is a value called the "sine" which is the ratio of the length of the hypotenuse to the length of the opposite side.

For CAB, the hypotenuse is CA and the opposite is CB. CA is 10"; CB is 5.6", so sin(CAB) is 0.56.

Now we look at ECD. D and A are collinear (on the same line), so ECD and ECA are the same angle. So they have the same sine.

The hypotenuse of ECD is EC, which is 9.8". So the opposite of ECD, which is h, must be 0.56*9.8=5.488"


* you can also do this with pythagoras.

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>>219048
thanks anon

>>219042
>>219043

10in is also the length of the hypotenuse of the dotted triangle, use that to know the length of its base and then the 2 unknown angles. All you need to know is the angle near the center of the figure, and once you know that you can know the angle inside the red area because both add up to 180 degrees. That is the same angle that the dotted line bisects, and if if you know the bisected angle and the fact that on the other end the line is at 90 degrees of the 10in line, there is exactly one position where all that can happen at the same time. Now that you know it just make 10in - Xin and that is the length of the side the red triangle delimited by the red line.

Now just input 9.8in as the other side, and use both of those to know h. As I said, piss easy, it took longer to type it than to figure it out.

>>219055
You don't deserve to pass whatever grade you're in, hope the teachers realise that for your sake

Jesus Fucking Christ /wsr/
What the hell

>>219060
I can't wait for it to sink in for you that everyone on 4chan is 15 years younger than you, neckbeard

>>219070
I can't wait to see you sweeping streets Jamal.

>>219070
That's literally 6th grade level math, fucktard

Formula for a parallelogram is base x height

A much easier solution, imo, is to use:
Area = 5.6 * 9.8 = 10 * h,
then isolate h to get h = 5.488 as mentioned in other replies.