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Core Plus: Circles
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Gravity
VASOL5.9; Identify and describe the diameter, radius, chord & circumference of a circle.
Terms in this set (9)
circle
A closed plane figure or shape made up of all points the same distance from the center
center
the name for the point in the middle of a circle that is the same distance from anywhere on the circle
diameter
a line segment/a special chord that passes through the center & touches 2 points on the circle (twice the length of the radius)
radius
Any line segment that connects the center of a circle to a point on a circle. 1/2 the length of the diameter.
circumference
the distance around a circle (about 3 times the diameter)
pi
the ratio of a circumference of a circle to its diameter;
c:d or c/d = 3.141592...; 3.14; 3 1/7
circumference of a circle
2πr
radius
In the formula for the circumference of a circle (2πr), the r stands for the ____.
area of a circle
π r squared= is the formula for the ____
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