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# Area of circle

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Hi friends,

how would I calculate the area of a circle if only the height and length of a segment is given. Height is 10cm and length is 500mm. Please help...

Nov 6, 2021

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Hi Juriemagic.

Here is the pic. Now use Pythagoras's theorem to find r.

If I have misunderstood then let me know.

Nov 7, 2021
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Hi Melody,

I love your diagrams, they are always so helpful for visualizing the problem.

One small note, since one length is in cm and the other is in mm, I think it would be helpful to convert one of them so that the units are the same.

550mm = 55cm

:))

=^._.^=

catmg  Nov 7, 2021
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Thanks Catmg.

I actually did not realize that the units were different

Melody  Nov 7, 2021
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And thanks very much for the compliment.

I enjoy using GeoGebra. (which is a free download or you can use it online)

It is capable of much more than I have so far learnt.

The only downside is that I have found very few good instruction tools.

So it is harder than it should be to learn.

Still, I find it a lot of fun to use and it is great when I learn to do new things with it.  :)

Melody  Nov 7, 2021
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Hi Melody,

I realize it's VERY VERY late to reply, the thing is I forget I have asked a question and sometimes only remember much later...really very sorry...Thank you for the answer....and it is really soooo easy....Like catmg has said, your diagrams are so very helpful....I do appreciate!

juriemagic  Nov 11, 2021