1. The document discusses various geometric shapes and concepts including lines, angles, circles, and curves. 2. Properties of these shapes such as lengths of lines, measures of angles, radii of circles, and equations of curves are presented. 3. Examples involve finding unknown values, identifying relationships between elements, and applying properties and theorems related to the various shapes.

1. 1.
4.1)

2. 4.1

3. ,
,
,
Curve)
2.

4. 2.1
1.
AB
2.
CD
3.
AO
OB
2.2
1.
BAC
A
B
AB
CD
A
O

5. 2.
E
F
D
3.
AD
BAC
2
2.3
1.
AB
AB
2.
5
A
A
(
3.
A
AC
4.
AB
5

6. 2.4
3
1.
ABCD
O
2.
A
AO
X, Y,
3.
XY,
YZ
XYZ
2.5
Z
ZX

7. 1.
ABCD
O
2.
A, B, C
D
AO
M, N, O, P
3.
AD
BAC
2
4.
2.6
1.
ABCD
O
2.
3.
OB
X
X
XC

8. AO
4.
Y
C
CY
M, N, O, P
5.
M,
N,
O,
P
2.7
1.
2.
O
A, B
AO
C, D, E
F
3.
AC, CE, EB, BF, FD

9. DA
4.
2.8
1.
AB
A
AB
C
2.
A1,
7
A2,
A3,
A4,
A5
A6

10. 3.
B
2
AB
A3, A6,
4.
MP
MP
AB
A4,
5.
A5
NO
A2, 2M, MN, NO, OP
PB
2.9
1.
2
A
r
2.
15
A
r
E
3.
E
F
F
r
O

11. 4.
O
r
2.10
1.
A
2.
r
10
3.
r
4.
O
5.
2.11
O
r

12. 1.
AB
100
CD
60
2.
AC
O
AO
3.
OC
C
CX
AC
4.
Y
AY
AO
X
AY
M
OD
P

13. 5.
O
OM
OB
6.
N
O
OP
OP
Q
7.
PN,
8.
M,
QN
N
r
9.
R
2.12
P, Q
R

14. 1.
AB
100
CD
60
2.
12
30
60
O
3.

15. 4.
Curve
3