Understanding Arcs, Chords, and Radii

What is an arc in the context of a circle?

• A point on the circumference of a circle

• A straight line passing through the center of a circle

• A curve connecting two points on a circle

• A line segment connecting two points on a circle

If a radius bisects a chord perpendicularly, what can be said about the chord?

• The chord is no longer part of the circle

• The chord becomes a tangent

• The chord is divided into two equal parts

• The chord is doubled in length

If a chord is bisected by a radius, what is the length of each segment if the total chord length is 12?

• 3

• 6

• 9

• 12

How do you calculate the radius if the diameter is known?

• Add the diameter to itself

• Subtract the diameter from itself

• Divide the diameter by two

• Multiply the diameter by two

What is the radius if the diameter of a circle is 31.8?

• 15.9

• 31.8

• 63.6

• 7.95

In a circle, if X is part of the radius and the radius is known, how can X be found?

• By adding X to the radius

• By subtracting the known part from the radius

• By dividing the radius by X

• By multiplying X by the radius

If X plus 4.5 equals the radius, and the radius is 12.6, what is X?

• 8.1

• 4.5

• 16.1

• 12.6

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

• The diameter is half the radius

• The diameter is equal to the radius

• The diameter is twice the radius

• The diameter is unrelated to the radius

What is the radius if the diameter is 18.8?

• 9.4

• 18.8

• 4.7

• 37.6

If X plus 4.2 equals the radius, and the radius is 9.4, what is X?

• 13.6

• 4.2

• 5.2

• 9.4