Concept 4
What is the formula?
Central angle x 2 pi r divided by 360
Central angles are..
an angle with its vertex at the center of a circle
area formula
the middle of a circle ..
center
a circle =
360
To find each arc Length round to the nearest?
Hundredth
The degree arc is formed by...
the endpoints of a central angle
Circumference formula..
C= 2 pi R
radius
half of a circle is
180
The length of an arc is a portion of what?
Circumference
Degrees are..
a unit of a measurement for angles
find the area and circumference and round to what?
The nearest tenth
a line that cuts through the middle
diameter
a third of a circle is
90
C =
Circumference
arc measurements..
describe a portion of a circle circumference
find the radius of a circle with a circumference of 21.99 ft.
3.5 ft
when two lines meet outside a circle
secant
inscribed angle is ..
an angle that is inside
x =
degree measure of arc
central angle =
arc measures
find the diameter of a circle with a circumference of 65.97 meters.
21 meters
a big angle
major arc
a semicircle is
half of a circle