circle: A = pi * r^2
square: A = 4s
Just plug in the numbers
Rachel is frosting the top of two cakes and wants to know which cake will require more frosting. one cake is round with a diameter of 8 inches. the other cake a square with the length of 9 inches. the top of which cake has a larger area? how much larger is it?
5 answers
so A=8 r^2 and
A=9s
A=9s
The radius is not 8. The diameter is 8. What happened to pi?
A = 4s
A = 4s
A=pi times r squared=3.14 times 4x4 = 50.265
Do a search for area of a circle and you'll find a great site for solving geometry problems.
Do a search for area of a circle and you'll find a great site for solving geometry problems.
it should be obvious that the square is larger, since the circle fits inside it
but by how much?
circle: 16 pi = 50.26
square: 9^2 = 81
.
but by how much?
circle: 16 pi = 50.26
square: 9^2 = 81
.
2 answers