Circumference Pi Day

• Determining how many one inch cubes fin into a container

• Measuring the circumference and diameter of several difference sized circles.

• Determining the number of tiles needed to cover a surface.

• Measuring the length of a piece of string used to wrap around a  polygon.

The _____________ of the circumference of a circle to its diameter is pi.

• Chord

• Ratio

• Diameter

• Radius

Which equation would be used to find the circumference of a circle with a radius of 40 feet?

What is the circumference of this circle?

• 3.14 cm 

• 37.7 cm

• 24 cm

• 68.4 cm

Find the circumference of the circle shown. (HINT: Circumference = 2πr)

• 9π in.

• 4.5π in.

• 81π in.

• 28.26π in.

• 18π in.

Which of the following below must you always use Pi calculations for?

• to find the area and circumference of a circle

• to find the area of a rectangle

• to find the height of a square

• to find the length from one edge of a triangle to another

• to find the derivative of a function

_{Find the Circumference.}

• 31.4 in

• 78.5 in sq

• 15.7 in

• 3.14 in 

There is a lawn which has a shape of a semicircle. If the diameter is 7m,then find the perimeter of the lawn.(Take pi =22/7)

• 29m

• 28m

• 18m

• 11m

What number is pi?

• 41

• 00

• 3.14

• 5.14

What is the approximate numerical value of this sign?

• 3.11

• 3.14

• 4.13

• 6.28