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Mathematics 8 Online
iosangel:

Math help?

iosangel:

Eiwoh2:

What do you know about getting the area of a circle, first of all?

iosangel:

I completely forgot, thats why I need help. :/

tigerlover:

Alright, what is your radius of this semicircle?

Eiwoh2:

Ah, ok. Well, i'm sure @ThisGirlPretty can help, as well. I am not really good at my math goods lol

Eiwoh2:

Or Tiger ^^

iosangel:

11cm?

tigerlover:

Radius of a semicircle, or circle, is from the middle to edge. This image shows the full length. What do we need to do find the radius?

iosangel:

we us the formula A = (Pi*r^2)/2.?

iosangel:

use*

tigerlover:

Alright but what do we need to do to find the radius first?

iosangel:

No idea.

tigerlover:

Whats half of 11mm?

iosangel:

5.5

tigerlover:

Correct. Now put that in your formula

iosangel:

A=(3.14*5.5^2)2

tigerlover:

Now simplify

iosangel:

189.97

tigerlover:

I believe that is your answer

iosangel:

Thanks!

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