Exploring Circles and Their Circumference

What defines the radius of a circle?

• A line parallel to the circle

• The longest line that can be drawn inside the circle

• A line connecting two points on the circle

• A line from the center to any point on the circle

What is a chord in a circle?

• A segment with endpoints on the circle's circumference

• A segment from the center to the circumference

• The longest possible segment within the circle

• A segment outside the circle

Which chord passes through the center of a circle?

• Tangent

• Secant

• Diameter

• Radius

How is the circumference of a circle calculated using the radius?

• C = 2r

• C = πr^2

• C = 2πr

• C = πd

If the radius of a circle is 11 feet, what is its approximate circumference using π = 3.14?

• 69.08 feet

• 22 feet

• 44 feet

• 34.54 feet

What is the relationship between the diameter and the radius of a circle?

• The diameter is half the radius

• The diameter is twice the radius

• The diameter is equal to the radius

• There is no specific relationship

How do you find the diameter of a circle if you know its circumference?

• Multiply the circumference by π

• Divide the circumference by π

• Multiply the circumference by 2π

• Divide the circumference by 2π

What transformation is needed to change a circle's size?

• Dilation

• Reflection

• Rotation

• Translation

If a circle is translated up 2 units and left 1 unit, what is the new position of its center?

• Down 2 and right 1 from the original position

• Up 2 and right 1 from the original position

• Down 2 and left 1 from the original position

• Up 2 and left 1 from the original position

Are all circles similar to each other?

• No, because they can have different diameters

• No, because they can have different radii

• Yes, but only if they have the same radius

• Yes, because they all have the same shape