# Thread: Help paralellogram finding the area

1. ## Help paralellogram finding the area

would really appreciate it if somebody good answer this ,

ABCD is a parallelgram
AB=12cm
BC = 8cm
the perpendicular distance of the line DC from the line AB is 7cm

(a)Work out the area of the parallelogram
(b) work out the perpendicular distance of the line AD from the line BC

And this pleas e, I hope tehre are some good maths people on please

the cross section of the solid prism is a right angle triangle. the triangle has a base of 6cm and a height of 8cm
the length of the solid prism is 20cm
(a) work out the volum of the solid prism

(b) the solid prism is made of metal
the mass of 1cm(cubed) of metal is 6cm
work out the total mass of the solid prism

2. Originally Posted by gilzean
would really appreciate it if somebody good answer this ,

ABCD is a parallelgram
AB=12cm
BC = 8cm
the perpendicular distance of the line DC from the line AB is 7cm

(a)Work out the area of the parallelogram
(b) work out the perpendicular distance of the line AD from the line BC

And this pleas e, I hope tehre are some good maths people on please

the cross section of the solid prism is a right angle triangle. the triangle has a base of 6cm and a height of 8cm
the length of the solid prism is 20cm
(a) work out the volum of the solid prism

(b) the solid prism is made of metal
the mass of 1cm(cubed) of metal is 6cm
work out the total mass of the solid prism
The area of a parallelogram is calculated by:

$a = base \cdot height$

If the base is AB = 12 cm and the height of AB is h = 7 cm the area is:

$a = 12 \cdot 7 = 84\ cm^2$

If the base is BC = 8 cm and the area didn't change you'll get the height by:

$84\ cm^2=8\ cm\cdot h~\implies~h=\dfrac{84\ cm^2}{8\ cm} = 10.5\ cm$

To the second question:
1. The given length must be the legs of the right triangle (not the hypotenuse!)
2. The area of this triangle is $a_{\Delta}=\frac12\cdot base \cdot height$ With your values you get: $a_{\Delta} = 24\ cm^2$

3. The volume of a prism is calculated by:

$V = area_{base} \cdot height_{prism}$
Plug in the values you know to get the volume.

The following question must be wrong: A mass of metall measured in cm is a mess.

3. you are an absolutley legend your the best and i will need your help with a few other uqestions when im back in 30 mins i hope you are still here i could really use your help thank you so much.

4. it was measure in grams sorry its 6 grams

5. Originally Posted by gilzean
you are an absolutley legend your the best and i will need your help with a few other uqestions when im back in 30 mins i hope you are still here i could really use your help thank you so much.
(blush)

You are welcome.

Probably I'm not online when you'll come back. So please start a new thread with your new questions and you'll get help pretty fast, promised!