Exploring Circles: Radius, Diameter, Chord, Area, and Circumference

What is the correct way to label a circle with center A?

• A Circle

• Circle center A

• Circle at A

• Circle A

Which segment represents the radius of a circle?

• Segment from center to any point on the circle

• Segment from one edge of the circle to the opposite edge

• Segment across the circle through the center

• Any segment connecting two points on the circle

What is a chord in the context of a circle?

• A curved line segment within the circle

• Only the longest possible segment through the center

• Any line segment from one point on the circle to another

• A segment from the center to the edge of the circle

Which formula can be used to calculate the circumference of a circle?

• pi * radius squared

• 2 * pi * radius

• Both A and B

• pi * diameter

How do you calculate the area of a circle?

• 2 * pi * radius

• radius * diameter

• pi * diameter

• pi * radius squared

What is the diameter of a circle if the radius is 8 feet?

• 4 feet

• 8 feet

• 16 feet

• 32 feet

What is the approximate value of the circumference if the radius is 8 feet?

• Approximately 200.96 feet

• Approximately 25.12 feet

• Approximately 50.27 feet

• Approximately 100.53 feet

If the radius of a circle is doubled, how does the area change?

• It quadruples

• It remains the same

• It doubles

• It halves

What is the exact area of a circle with a radius of 8 feet?

• 128 pi square feet

• 16 pi square feet

• 64 pi square feet

• 32 pi square feet

Why is it important to use exact values like pi in calculations?

• It provides more accurate results

• It simplifies the calculation process

• It is easier to remember than decimal approximations

• It is a requirement in all mathematical calculations