## Tuesday, November 23, 2010

### Camille's Scribepost

Today in math class we had to find the answer to say for example 8²= 64 the answer is 4 because we look for the number that is in the ones place and also find the pattern. We also had to figure out some math problems.

examples:

Circle radius is 4 cm. How much of the square is not covered by the circle?
Formula: (2r)² -π r²
(2r)² -π r²
(2•4)² -π 4²
8²-π 16
64-16.π
= 13.73 cm²
First do the bracket. r= 4. So 2 multiplied by 4 equals 8². then 4² = 16. 8² = 64. So 64 subtract by 16 multiplied by π. equals 13.73 cmπ

Side is 12 cm. How much of the square is not covered by the circle?
Formula: s² - π ( s/2) ²
12²-π (12/2)²
12²-π 6²
144-π 36
= 30.90 cm²

S²=12². Then you do the brackets, so 12 divided by 2 all squared equals 6². 12² equals 144 and 6² equals 36. So 144- π x 36
We also learned what a coefficient is. It is the number you multpiy by. Like 4x, 4 is the coefficient and x is variable.
Oh remember to comment If I made any mistakes! Thank you!
by the way sorry for the layout. blogger isnt cooperating with me.