Chapter 10.1: Circles

Question 1

Circle

Answer 1

set of all points in a plane that are equidistant from a given point, called the center of the circle.

Question 2

Circle Interior

Answer 2

the points inside form the circle’s interior.

Question 3

Circle Exterior

Answer 3

the points outside the circle form its exterior.

Question 4

Chord

Answer 4

a segment whose endpoints are on the circle.

Question 5

Diameter

Answer 5

is a chord that passes through the center.

Question 6

Radius

Answer 6

a segment that has the center as one endpoint and a point on the circle as the other endpoint.

Question 7

Tangent

Answer 7

a line that intersects the circle at exactly one point.

Question 8

Point of tangency

Answer 8

the point at which it intersects the circle.

Question 9

Secant

Answer 9

a line that intersects the circle in two points.

Question 10

Common tangent

Answer 10

a line that is tangent to two circles.

Question 11

Common external tangent

Answer 11

a common tangent that does not intersect the segment that joins the centers of the circles.

Question 12

Common internal tangent

Answer 12

a common tangent that intersects the segment that joins the centers.

Question 13

Tangent circles

Answer 13

circles that have exactly one point of intersection.

Question 14

Concentric circle

Answer 14

circles that have the same center but different radii.

Question 15

Congruent circles

Answer 15

two circles are congruent if their radii are congruent.