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1999 BAMO
2
BAMO Geo
BAMO Geo
Source: BAMO 1999/p2
August 11, 2019
BAMO
geometry
Problem Statement
Let
O
=
(
0
,
0
)
,
A
=
(
0
,
a
)
,
a
n
d
B
=
(
0
,
b
)
O = (0,0), A = (0,a), and B = (0,b)
O
=
(
0
,
0
)
,
A
=
(
0
,
a
)
,
an
d
B
=
(
0
,
b
)
, where
0
<
b
<
a
0<b<a
0
<
b
<
a
are reals. Let
Γ
\Gamma
Γ
be a circle with diameter
A
B
‾
\overline{AB}
A
B
and let
P
P
P
be any other point on
Γ
\Gamma
Γ
. Line
P
A
PA
P
A
meets the x-axis again at
Q
Q
Q
. Prove that angle
∠
B
Q
P
=
∠
B
O
P
\angle BQP = \angle BOP
∠
BQP
=
∠
BOP
.
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