Deriving Pi

What is the best way to find pi?

• 3.1415...

• 22/7

• C/D

• 20 x 3.1415...

Tags

CCSS.HSG.GMD.A.1

Which is just an estimate or approximation of pi?

• 22/7

• pi

• C/D

• 3

Tags

CCSS.HSG.GMD.A.1

Ahmed measured the diameter (d) and circumference (C) of a circle accurately to the nearest mm, with the results:

d = 113 mm

C = 355 mm

He then used his measurements to calculate a value for π correct to 7 decimal places. What value did he get?

• 3.1415926

• 3.1415927

• 3.1415928

• 3.1415929

Tags

CCSS.2.MD.A.2

_diameter?

• 5 in
• 10 in
• 3.14 in
• 2.5

Tags

CCSS.7.G.B.4

Determine the radius of the penny

• 59.66 mm
• 9.5 mm
• 38 mm
• 119.32 mm

Tags

CCSS.7.G.B.4

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.
• The measurement around the circle
• The measurement from and edge of the circle to another edge through the center
• A line perpendicular to the diameter of the circle

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters
• 125 meters
• 25 meters
• 50 meters

Tags

CCSS.7.G.B.4

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards
• 25 yards
• 150 yards
• 15 yards

Tags

CCSS.7.G.B.4

One diameter will not wrap around a circle, but approximately  _____________ diameters will wrap around the outside of the circle. 

• three
• two 
• 100

Tags

CCSS.7.G.B.4

To mathematically calculate the special number "pi" you need the __________________________.  

• circumference  &  the diameter 
• diameter  &  the radius 
• any two parts of the circle 

Tags

CCSS.7.G.B.4