Find the perimeter and area of each parallelogram. Round to the nearest tenth. Help

- anonymous

Find the perimeter and area of each parallelogram. Round to the nearest tenth. Help

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- jim_thompson5910

Where is the parallelogram?

- anonymous

|dw:1327364287076:dw|

- jim_thompson5910

does it say anything about it being a rhombus?

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## More answers

- anonymous

No

- jim_thompson5910

you made a mark in the lower right hand corner to denote a right angle, but you clearly have a 45 degree angle to the left of that, so which one is it?

- anonymous

That's what the book picture is

- anonymous

|dw:1327364747193:dw|

- anonymous

i cant draw stright

- jim_thompson5910

oh ok, one sec

- anonymous

k

- jim_thompson5910

the problem here is that this has to be a rhombus because if it wasn't then we'd be missing information (namely the base side that runs parallel to the ground), so double check to make sure that nothing is missing

- anonymous

Number 10 hold on

- jim_thompson5910

alright

- anonymous

##### 1 Attachment

- anonymous

there

- jim_thompson5910

oh i see now

- anonymous

if u can do it Show Work plz

- jim_thompson5910

are you familiar with trigonometry?

- anonymous

Nope Only Alg and Geo

- jim_thompson5910

We can cut that parallelogram in half along that dashed line to get those two triangles
We can then find the base b through the formula
b = x/sqrt(2)
where x is the hypotenuse
In this case, x = 4, so the base is
b = 4/sqrt(2) = 2.828
So the perimeter is
P = 2*4 + 2*2.828
P = 13.656
So the perimeter is roughly 13.656 meters
And the area of one triangle is
A = (bh)/2
A = (2.828*2.828)/2
A = 8/2
A = 4
which means that the area of the parallelogram is 2*4 = 8 square meters

- anonymous

tanx a lot

- jim_thompson5910

yw

- anonymous

Damn homework

- jim_thompson5910

lol

- jim_thompson5910

hw will get annoying definitely

- anonymous

Willing to help wit all? 9-19 20-28even

- jim_thompson5910

i'm afraid i don't have enough time, which one is really bugging you

- anonymous

idk lol how long do u have

- jim_thompson5910

about 10 min or so

- anonymous

ok can u do some if u can

- jim_thompson5910

alright, which one do you want me to do?

- anonymous

11

- anonymous

srry if i seem a pain in the A$$

- jim_thompson5910

No you're not a pain at all.
# 11
This is a square. And the formula for the perimeter is
P = 4s
P = 4*5.4
P = 21.6
So the perimeter is 21.6 cm
and the formula for the area is
A = s^2
A = (5.4)^2
A= 5.4*5.4
A= 29.16
So the area of the square is 29.16 square cm

- anonymous

12? if u have time

- jim_thompson5910

Last one and then I have to go
# 12
Perimeter:
P = 2*15+2*10
P = 30+20
P = 50
So the perimeter is 50 inches
Area:
A = bc*sin(theta)
A = 10*15*sin(45)
A = 150*0.70710678
A = 106.066017
So the area is roughly 106.066017 square inches

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