chapter ten vocab

Question 1

a part of a circle that is defined by two endpoint

Answer 1

arc

Question 2

an angle that intersects a circle in two points and has it’s vertex at the center of the circle

Answer 2

central angle

Question 3

1. for a given circle,, a segment with endpoints that are on the circle
2. for a given sphere, a segment with endpoints that are on the sphere

Answer 3

chord

Question 4

the focus of all points in a plan equidistant from a given point called the center of the circle

Answer 4

circle

Question 5

the distance around a circle

Answer 5

circumference

Question 6

1. In a circle, a chord that passes through the center of a circle
2. in a sphere, a segment that contains the center of the sphere, and has endpoints that are on the sphere

Answer 6

diameter

Question 7

an angle that has a vertex on a circle and sides that contain chords of the circle

Answer 7

inscribed angle

Question 8

an arc with a measure greater than 180.

Answer 8

major arc

Question 9

an arc with a measure less than 180

Answer 9

minor arc

Question 10

an irrational number represented by the ratio of the circumference of a circle to the diameter of a circle

Answer 10

pi (π)

Question 11

1. in a circle, any segment with endpoints that are the center of the circle and a point on the circle
2. in a sphere, any segment with endpoints that are the center and a point on the sphere

Answer 11

radius

Question 12

any line that intersects a circle in exactly two points

Answer 12

secant

Question 13

an arc that measures 180

Answer 13

semicircle

Question 14

2. a line in the plane of a circle that intersects the circle in exactly one point. the point of intersection is called the point of tangency
3. a line that intersects a sphere in exactly one point

Answer 14

tangent