Areas of circles and Sectors, Geometry Chapter 8
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24 Terms
Area of circles
Piersquared
Area of a sector of a circle
measure angle/360*Piersquared
Sector of a circle definition
Region bounded by arc and 2 radii to endpoints.
Segment of a circle definition
Part of circle bounded by arc, joining endpoints.
Area of segment
Measure angle/360Piersquared-Bh/2= Area of segment.
Area of a trapezoid
Area of a rhombus
Area of a parallelogram
Area of a Rectangle
Area of a Square
Circumference of a Circle
Diameter of a Circle
? = 2r
Area of a triangle
Central Angle
The angle formed by 2 radii at the center of a circle
Radius
The distance from the center to a point on the circle.
Diameter
The distance across the circle, through the center; the width of a circle
Circle
the set of all points in a plane that are the same distance.
Circumference
The distance around a circle
A = 1/2 h (b + b)
Area =
A = 1/2 b h
Area =
A = bh
Area =
A = bh
Area =
C = 2(pi)r
Circumference =
A = bh
Area =
