Exploring Circumference and Area of Circles

What does pressing the PI button on a calculator typically show?

• A random number

• The number 3

• The exact value of pi

• A decimal approximation of pi

What is the area formula for a parallelogram?

• Two times base plus height

• Base plus height

• Base times height

• One-half base times height

What does the radius of a circle represent?

• The distance across the circle through the center

• The distance from the center to the edge of the circle

• The perimeter of the circle

• The area of the circle

What is the formula for the area of a triangle?

• Base plus height

• One-half base times height

• Base times height

• Two times base times height

What is pi approximately equal to?

• Both 3.14159 and 22/7

• 22/7

• 3.15

• 3.14159

How is pi defined in mathematics?

• The ratio of radius to diameter

• The ratio of diameter to circumference

• The ratio of circumference to diameter

• The ratio of area to radius

How do you calculate the circumference of a circle?

• pi * radius squared

• 2 * pi * radius

• pi * diameter

• 2 * radius

What does squaring a number involve?

• Multiplying the number by two

• Multiplying the number by itself

• Dividing the number by two

• Adding the number to itself

What geometric shape is used in the 'orange peel' analogy to explain the area of a circle?

• Circle

• Triangle

• Parallelogram

• Rectangle

What is the correct formula for calculating the area of a circle?

• Radius squared / pi

• Pi * diameter

• 2 * pi * radius

• Pi * radius squared