Tried not to make thread but stuck sorry

[bronx.system]

This question tripped me up because its area not perimeter been trying different things but getting no where

The area of a parallelogram is 27cm^2. If the length is three times as long as the perpendicular height and twice as long as the width, what are the lengths of the parallelogram's sides.

My work:
I know area = l x h
but why did they add in the part about the width? not working out volume right?

length = 3h
3h + 2 (3h) = 27^2 is wrong because im not working out perimeter.
how do i break this one down S:

 

[pka]

This question tripped me up because its area not perimeter been trying different things but getting no where
The area of a parallelogram is 27cm^2. If the length is three times as long as the perpendicular height and twice as long as the width, what are the lengths of the parallelogram's sides.

\(\displaystyle \text{Area}=Lh=3h^2\). Solve for \(\displaystyle h\).

 

[Deleted member 4993]

This question tripped me up because its area not perimeter been trying different things but getting no where

The area of a parallelogram is 27cm^2. If the length is three times as long as the perpendicular height and twice as long as the width, what are the lengths of the parallelogram's sides.

My work:
I know area = l x h
but why did they add in the part about the width? not working out volume right?

length = 3h
3h + 2 (3h) = 27^2 is wrong because im not working out perimeter.
how do i break this one down S:

A = L * h

27 = (3*h) * h

3*h² = 27

h = 3

L = 3*h = 9 cm

W = L/2 = 4.5 cm

Parallelograms have 4 sides - 2 opposite sides are equal to each other. Sort of "compressed/slanted" rectangle. Two adjacent sides(so called length and width) of a parallelogram are not perpendicular to each other (unlike rectangles).

 

[bronx.system]

thanks all that makes a lot of sense now

the book im learning from doesn't show working, making it tricky to see what im doing wrong.

thanks again

 

[bronx.system]

yeah makes sense now ^^

just curious does anyone recommend a specific book or author to learn algebra? or any book on the subject will do