Grades 6-8 Fcat 2.0 Mathematics Reference Sheet Page 13
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20Supporting Idea 4: Geometry and Measurement
Geometry and Measurement
Objective: Identify and describe the parts of a circle (circumference, radius, or diameter).
A circle is a set of points equidistant from a given point.
The radius is a line segment that has one endpoint at the center and the other endpoint on the circle.
The diameter is a line segment that passes through the center of the circle and has both endpoints on the circle.
The circumference of a circle is the distance around the circle.
Examples:
SR is a radius of the circle. ST is also a radius of the circle.
S
R
T
is the diameter of the circle.
RT
The circumference of the circle is the distance around the circle from
point R to point R.
1.)
2.)
Name a radius: _______
Label radius WV.
C
Name the diameter: _______
Label radius WX.
A
B
To measure the circumference
Name the diameter: _______
of the circle, you could start at
point _____ or point _____.
3.) Draw a circle.
4.)
Draw a center point and label it H.
Y
Name all of the radii:
Draw the diameter FG .
_____________________
C
Name the two radii: _______ and _______
A
B
Name all of the diameters:
______________________
Z
5.) Draw and label a diameter in each circle.
6.) Draw and label a diameter in each circle.
Draw and label 2 radii in each circle.
Draw and label 2 radii in each circle.
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