10.1-10.2 vocab quiz

Question 1

circle

Answer 1

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

Question 2

Interior of a circle

Answer 2

the points inside a circle make up its interior

Question 3

exterior of a circle

Answer 3

the points outside a circle form its exterior

Question 4

chord

Answer 4

a chord of a circle is a segment whose endpoints are on the circle

Question 5

diameter

Answer 5

a diameter of a circle is a chord that passes through the center. the diameter is twice the radius

Question 6

radius

Answer 6

a radius of a circle is 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 tangent of a circle is a line that intersects the circle at exactly one point.

Question 8

point of tangency

Answer 8

the pt at which a tangent intersects a circle or sphere is the pt of tangency

Question 9

secant

Answer 9

a secant of a circle is a line that intersects the circle in two points

Question 10

common external tangent

Answer 10

a common tangent to two circles that does not intersect the segment that joins the centers of the two circles together

Question 11

common internal tangent

Answer 11

a common tangent to two circles that intersects the segment that joins the centers of the circles together

Question 12

tangent circles

Answer 12

tangent circles are circles that have exactly one point of intersection

Question 13

concentric circles

Answer 13

concentric circles are circles that have the same center but different radii

Question 14

congruent circles

Answer 14

two circles are congruent if their radii are congruent

Question 15

thm 10.1

Answer 15

if a line is tangent to a circle then it is perpendicular to the radius drawn to the point of tangency

Question 16

thm 10.2

Answer 16

in a plane, if a line is perpendicular to a radius of a circle at its endpoint on the circle, then it is tangent to the circle

Question 17

thm 10.3

Answer 17

if two segments from the same exterior point are tangent to a circle, then the segments are congruent.

Question 18

inscribed circle

Answer 18

a circle is inscribed in a polygon if each side of the polygon is tangent to the circle.

Question 19

circumscribed circle

Answer 19

a circle is circumscribed about a polygon if each vertex of the polygon is on the circle.