[Louismoore16]

i need to know how to work out the area of a circle by using the diameter
so if the diameter was 12.3 what would be the answer and how would you work it out?

[Unbounded]

divide diameter by two to get the radius.

area = pi x radius squared

[James]

Have you learnt any formulas for finding the area of a circle?

[BJack]

[Louismoore16]

right so just let me check ive done this question right and if i have im sorted
the question was find the area of a circle by using diameter=14.8cm
so i do 14.8 divided by 2=7.4 pie time 7.4 squared=172.3

is this correct?

[letsdothetimewarpagain]

3.14*6.15 squared = 118.76 (2dp)

I think

[IChem]

It's 172.03, but I'm guessing that was just a typing error.

[L-C-17]

Right, this is a rhyme (!) which will mean u never 4get this formulae again!!!

Tweedle dum and tweedle dee,
round the circle is pie x d,
but if the area be declared,
the formula is pie x r squared!

Learn this and then use it. Obviously, d is diameter and r is radius!

Enjoy!

[hermaphrodite]

pie r squared where r is half the diameter

[L-C-17]

Sounds about right 2 me. Is this work 4 2morrow lol?

[tomthecool]

(Original post by Louismoore16)
right so just let me check ive done this question right and if i have im sorted
the question was find the area of a circle by using diameter=14.8cm
so i do 14.8 divided by 2=7.4 pie time 7.4 squared=172.3

is this correct?

You've changed the question slightly. In your first post, you said the diameter = 12.3

But anyway, if the diameter is 14.8cm, then the area is 172.0336... (not 172.3), but you'd probably want to round that down to 172cm squared.

[Louismoore16]

ok thanks for all you help
L-C-17: this is for my maths homework lol
Tomthecool: i changed the question half way throught to 14.8 so i could check if i go it right
and IChem: yes i ment to put 172.03 but my key is abit sticky lol
and sorry about posting so much of the same thing, my page kept refreshing and sending.