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Mathematics 7 Online
OpenStudy (anonymous):

The area of the parallelogram shown is 4 mm^2. What is the perimeter? Show your work.

OpenStudy (anonymous):

OpenStudy (anonymous):

help me please

jimthompson5910 (jim_thompson5910):

Are you familiar with the area of a parallelogram formula?

OpenStudy (anonymous):

yes can you please give me the answer i need to get this done in 20 min and i have 15 more question

jimthompson5910 (jim_thompson5910):

I'll help get there, but I can't just give you the answer.

OpenStudy (anonymous):

ok then help me

jimthompson5910 (jim_thompson5910):

help get you there*

jimthompson5910 (jim_thompson5910):

What is the area of a parallelogram?

jimthompson5910 (jim_thompson5910):

Any ideas?

OpenStudy (anonymous):

no

jimthompson5910 (jim_thompson5910):

It's basically the same as a rectangle Area = base * height

jimthompson5910 (jim_thompson5910):

What's the height in this case?

OpenStudy (anonymous):

dude please help me my moms friend is going to be here in like 3 min and we both dont know what to do and we need to get it done please!!!!!!!!!!!!!

jimthompson5910 (jim_thompson5910):

I'm trying to help you through it so you can answer these on your own.

jimthompson5910 (jim_thompson5910):

So looking at the figure, the height is what?

OpenStudy (anonymous):

7mm

jimthompson5910 (jim_thompson5910):

good, so h = 7

jimthompson5910 (jim_thompson5910):

The base is what?

OpenStudy (anonymous):

idk it doesnt say

jimthompson5910 (jim_thompson5910):

so we let that be unknown for now So b = x

jimthompson5910 (jim_thompson5910):

Therefore, A = b*h A = x*7 A = 7x

jimthompson5910 (jim_thompson5910):

What's the given area?

OpenStudy (anonymous):

14mm

jimthompson5910 (jim_thompson5910):

That's the length of one side, not the area

jimthompson5910 (jim_thompson5910):

actually, nvm 10 is that length

OpenStudy (anonymous):

read it again its 14mm^2

jimthompson5910 (jim_thompson5910):

hmm it says 4 mm^2 at the top

OpenStudy (anonymous):

opps that is wrong its 14mm i forgot to put a 1

jimthompson5910 (jim_thompson5910):

So A = 14

jimthompson5910 (jim_thompson5910):

and A = 7x becomes 14 = 7x solve this for x What do you get?

OpenStudy (anonymous):

what do you mean

jimthompson5910 (jim_thompson5910):

What do you get when you solve 14 = 7x for x?

OpenStudy (anonymous):

idk

jimthompson5910 (jim_thompson5910):

7 times what number = 14 ?

OpenStudy (anonymous):

2

jimthompson5910 (jim_thompson5910):

good, so the base is 2

jimthompson5910 (jim_thompson5910):

Since we have a parallelogram, we know that the opposite sides are equal, so we know that |dw:1339962664965:dw|

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