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Math
Geometry
Geometry 5th Grade: Circles Pics "Part2"
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VASOL5.9; Identify and describe the diameter, radius, chord & circumference of a circle.
Terms in this set (13)
central angle
An angle whose vertex is the center of the circle
protractor
a tool used to draw & measure the size of an angle
degree
a unit of measure for angles
right angle
an angle whose measure is 90 degrees
straight angle
an angle whose measure is 180 degrees
obtuse angle
an angle whose measure is between 90 and 180 degrees
acute angle
an angle whose measure is less than 90 degrees
cone
a solid figure with one circular base and one vertex
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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