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#1
the area of the pentagon is 8.56cm2
change 8.56cm2 to mm2
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1 year ago
#2
If 1cm=10mm then 1cm2 = 100mm2.
8.56cm2 = 856mm2.
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#3
(Original post by bfm.mcdermott)
If 1cm=10mm then 1cm2 = 100mm2.
8.56cm2 = 856mm2.
Thank you. Is it alright if I ask for more questions like this
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#4
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1 year ago
#5
(Original post by bfm.mcdermott)
If 1cm=10mm ..
Please do not post full solutions it is against the rules
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1 year ago
#6
(Original post by 1102ha11)
Use the idea you were given and post what you get - we don't do questions for people
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1 year ago
#7
(Original post by Muttley79)
Please do not post full solutions it is against the rules
Oh, sorry.

(Original post by 1102ha11)
No. I've shown you how the conversion works. I won't do your homework for you. It's better for you to practise them yourself - me doing it won't help your education.
To go from mm^2 to cm^2, just do the opposite to what I did to go from cm^2 to mm^2.

Conversion values are just something you need to learn for exams.
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#8
(Original post by bfm.mcdermott)
No. I've shown you how the conversion works. I won't do your homework for you. It's better for you to practise them yourself - me doing it won't help your education.
To go from mm^2 to cm^2, just do the opposite to what I did to go from cm^2 to mm^2.

Conversion values are just something you need to learn for exams.
I’m trying but I don’t get it at all😭 also it’s not homework it’s just me practicing for my exams
Last edited by 1102ha11; 1 year ago
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1 year ago
#9
(Original post by 1102ha11)
I’m trying but I don’t get it at all😭 also it’s not homework it’s just me practicing for my exams
If you're practising for exams, then me just giving you answers won't help at all.

Which question are you on now? I'll try and talk you through it so you can answer it yourself.
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#10
(Original post by bfm.mcdermott)
If you're practising for exams, then me just giving you answers won't help at all.

Which question are you on now? I'll try and talk you through it so you can answer it yourself.
The third one. Would I divide 6900mm2 by 1000 to get cm2?
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1 year ago
#11
(Original post by 1102ha11)
I’m trying but I don’t get it at all😭 also it’s not homework it’s just me practicing for my exams
Think about what was posted - imagine a square 1 cm by 1 cm
It's area is 1 cm^2

Now if we convert the lengths into mm the square is 10 mm by 10 mm so it's area is ....

I recommend doing these questions like this [referring to lengths] rather than trying to remember conversion for areas/volumes
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#12
(Original post by Muttley79)
Think about what was posted - imagine a square 1 cm by 1 cm
It's area is 1 cm^2

Now if we convert the lengths into mm the square is 10 mm by 10 mm so it's area is ....

I recommend doing these questions like this [referring to lengths] rather than trying to remember conversion for areas/volumes
10mm by 10mm would give an area of 10mm^2?
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1 year ago
#13
(Original post by 1102ha11)
10mm by 10mm would give an area of 10mm^2?
No - how do we get area?
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#14
(Original post by Muttley79)
No - how do we get area?
L X W
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1 year ago
#15
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1 year ago
#16
(Original post by 1102ha11)
L X W
yes so for a 10mm by 10 mm square the area is
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1 year ago
#17
(Original post by 1102ha11)
The third one. Would I divide 6900mm2 by 1000 to get cm2?
How did you get 1000?

mm -> cm is divide by 10.
so mm2 -> cm2 is divide by 102

What is 102?
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#18
(Original post by Muttley79)
yes so for a 10mm by 10 mm square the area is
100
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#19
(Original post by bfm.mcdermott)
How did you get 1000?

mm -> cm is divide by 10.
so mm2 -> cm2 is divide by 102

What is 102?
Oh so the answer is 690cm^2?
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1 year ago
#20
use this method.
to get from mm to cm you divide by 10
to get from mm^2 to cm^2 you divide by 10^2 [i.e 100]
to get from cm to mm you multiply by 10
to get from cm^2 to mm^2 you multiply by 10^2

to get from cm^3 to mm^3 you multiply by 10^3

maths is very logical.
BTW in exams sometimes they might ask you to go from mm^3 to m^3
So divide by 10^3 to get cm^3, then divide by 100^3 to get to m^3

hope this helped
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