examples:

Circle radius is 4 cm. How much of the square is not covered by the circle?

Formula: (2r)² -π r²

Answer:

(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

Answer:

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.

when your looking for a pattern in exponents, you ignore zero

ReplyDeleteYep, you ignore the zero. I think Mr. Backe said so in class.

ReplyDelete