Deriving Pi Circumference and Area of Squares

Which is just an estimate or approximation of pi?

• 22/7

• pi

• C/D

• 3

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

Determine the radius of the penny

• 59.66 mm

• 9.5 mm

• 38 mm

• 119.32 mm

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

• circumference  &  the diameter 

• diameter  &  the radius 

• any two parts of the circle 

• 43.96

• 153.86

• 87.82

• 307.72

Which of the following below would you have to use Pi for?

• the area and circumference of a circle

• the area of a rectangle

• the height of a square

• the length from one edge of a triangle to another

The equation C = πd, is used to find the circumference of a circle given it's diameter. This formula can be rearranged to solve for pi. Which equation is written correctly to solve for pi?

• π = Cd

• π = C ÷ d

• π = d ÷ c

• π = C - d

• 5 cm

• 10 cm

• 2.5 cm

• 7.5 cm

Pi is approximately equal to?

• Threeve (a combination of 3 and five)

• 19.6

• 7.2

• 3.14