Chapter 11 Flashcards
(22 cards)
Thm 11-8 Area of a Circle
The area of a circle can be found by A=r2(3.14) where r = radius
Sector
Of a circle is a region bound by a central angle and it’s corresponding arcs
Thm 11-7 Circumference of a Circle
The circumference of a circle can be found by C=2(3.14)r r=radius or 3.14d d is diameter
Pi
The ratio of the circumference to its diameter
Circumference
Of a circle is the distance around the circle
Concentric
2 circles if they lie in the same plane, have the same center and have radii of different lengths
Diameter
A chord that connects the center
Chord
A segment whose endpoints are on the circle
Radius
A segment whose end points are the center and a point on the circle
Center
The given point
Circle
Is the set of all points in a plane that are equidistant from a given point
Thm 11-9 Area of a Sector of a Circle
The area of a sector can be found by A=n/360(3.14r2) where n is the central angle measurement r=radius
Inscribed Polygon
A polygon whose vertices all lie on a circle
Measure of a semi circle
Is 180
Measure of a major arc
The difference between 360 and the measure of its associated minor arc
Measure of a minor arc
Is the measure of its central angle
Adjacent Arcs
Have exactly 1 point in common
Semi-circle
An arc that is exactly 1/2 the circle
Major Arc
An arc that is more than 1/2 the circle
Minor Arc
Is an arc that is less than 1/2 the circle
Arc
Set of points along a circle defined by a central angle
Central Angle
Is formed when the 2 sides of an angle meet at the center of a circle
