Measurements Of Polygons And Circles Worksheets - Lance Mangham, 6th Grade Math, Carroll Isd Page 20
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40Activity 10-15: Circles
Name:
Symbols
∠
BAC
Angle BAC
Ray AB
AB
Line Segment AB
Arc AB
AB
AB
Line AB
AB
P
C
Point O is the center of the circle.
AB is the diameter.
D
E
A
B
OA is the radius. OP is also a radius.
O
CD and EF are
P
F
chords.
Q
A diameter of a
circle is the
A
longest chord.
O
and
are central angles.
∠
AOP
∠
AOQ
The diameter is twice the length of the radius.
The radius is half the diameter.
d
r =
2
d
=
r
2
Draw and label the following parts (one per circle).
Chord QR
Diameter KL
Center O
Radius OT
Central angle WOK
∠
Find the unknown length of each circle.
Radius
Diameter
Radius
Diameter
6.
8 cm.
7.
110 in.
8.
48 ft.
9.
23 mm.
10.
55 ft.
11.
18 in.
5
3
6
yd.
7
in.
12.
13.
8
4
14.
12.3 mi.
15.
16.4 m.
16.
3.3 cm.
17.
1.25 yd.
18.
2.6 m.
19.
9.1 in.
th
Created by Lance Mangham, 6
grade math, Carroll ISD
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