Circle terms/ Formulas
The formula for Circumference.
C=2pi(r)
C=pi(d)
diameter is 5, what is the circumference?
15.7
a circular flower bed has a diameter of 7 meters, what is the area of the flower bed?
38.5meters^2
The radius is 1.5, what is the area?
7.065
What is Abby's favorite colour?
Green
The formula for Area.
A=pi(r)^2
if the diameter is 14.37, what is the circumference?
45.1218
A cell phone mast has a range of 5 km, what is the total area covered by one mast?
78.5 square km
The diameter is 14, what is the area?
153.86
When did Abby move to Stittsville?
The summer before grade 3
The formula for Diameter if you have the circumference.
D=C/pi
if the radius is 9, what is the circumference?
56.52
Phinny baby measured a flat ball, he did the math and found that the circumference was 27cm, what is the area?
58cm^2
The circumference is 30km, what is the area?
71.656km^2
How many pets has Abby had in her life?
7
The formula for Radius if you only have the circumference.
R=C/pi/2
if the radius of the circle is 27.3321cm, what is the circumference?
171.645588
Molly has three pies to share with her seven friends, the diameter pie one of them is 14.395cm, and pie two is exactly half the size in diameter. what is the area of each pie?
Pie one: 45.2003
Pie two:22.60015
The diameter of Sally's cake is 1/4 the area of Nelly's cake. Nelly's cake is 28cm. What is the area of Sally's cake?
38.465cm^2
What is Abby's favorite candy?
Sour patch kids
The first 13 digits of pi.
3.141592653589
The area is 573cm^2, what is the circumference?
27cm
A circular mirror has an area of 144cm^2, what is the diameter of the mirror
The diameter of the mirror is 42 cm
The diameter of Chloe Bean's cake is 1/4 the diameter of Sebean's cake. Sebean's cake is 54.27cm. What is the area of Chloe Bean's cake?
144.5cm^2
What is Abby's middle name?
Savana