circle properties

Question 1

radius

Answer 1

half the diamter goes from center of circle to the edge

Question 2

diameter

Answer 2

goes through the center when going from one side of the circle to the other

Question 3

circumference definition

Answer 3

outer edge of circle

Question 4

circumference formula

Answer 4

C= pi (diameter) or C= 2 (pi) (radius)

Question 5

area of circle

Answer 5

A= (pi) (radius)(radius)

Question 6

tangent line to a circle

Answer 6

just touches the circle

Question 7

secant line

Answer 7

a line that touches the circle in 2 places

Question 8

chord

Answer 8

line segment that touches the circle in 2 places

Question 9

arc

Answer 9

part of the circumference of a circle

Question 10

segment of circle

Answer 10

the space from a chord to the circumference

Question 11

sector of a circle

Answer 11

the space between two radii and the circumference

Question 12

symbol usually used to talk about angles

Answer 12

theta

Question 13

area of a sector formula

Answer 13

(degrees/360) (pi)(radius)(radius)

Question 14

area of a sector logic

Answer 14

(area of a circle) (the degrees divided by the total degrees) or the proportion of the circle times the whole circle

Question 15

arc length

Answer 15

(degrees/180) (pi)(radius)

Question 16

arc length logic

Answer 16

(circumference of a circle) (the degrees divided by the total degrees) or the proportion of the circle times the whole circle