formulas
What is the formula to calculate the radius of a circle given the diameter?
r=D/2
What is the name given for the distance from the center of the circle to its outer rim?
radius
What is the definition for the radius of a circle?
The distance from the center of the circle to its outer rim.
Calculate the radius of a circle that has a diameter of 50cm.
25cm
Is π a regular or irregular number?
Irregular
What is the formula to calculate the diameter of a circle given the radius?
D=2r
What is the mane given for a chord that passes through the center of the circle?
Diameter
What is the definition for the diameter of a circle?
A chord that passes through the center of the circle.
Calculate the diameter of a circle that radius of 30m.
60m
Is π a function or a constant?
Constant
What is the formula to calculate the circumference of a circle given the radius?
C=2πr
What is the name given for the perimeter of a circle?
Circumference
What is the definition for the circumference of a circle?
the measure of the perimeter of a circle.
Calculate the circumference of a circle that has a radius of 28mm.
175.84mm
Where did the first known reference for π originate?
Egypt/Babylon
What is the formula for calculating the area of a circle given the radius?
A=πr2
What is the name given for the exact center of a circle?
Center Point
What is the definition for the center point of a circle?
A point located in the exact center of the circle.
Calculate the Area of a circle that has a radius of 10cm.
314cm2
What alphabet does the symbol for π come from?
Greek alphabet
How is the value for π calculated (give the formula)?
π=C/D
How many sides does a circle have?
2-inside and outside
What is the definition of a chord?
A line segment whose endpoints are on a circle.
Calculate the radius of a circle that has an Area of 314k2.
10k
What Chinese mathematician first calculated π to be 3.1415926<π <3.1415927?
Zu Chongzhi