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2023 MOAA
2
MOAA Accuracy P2
MOAA Accuracy P2
Source:
October 13, 2023
MOAA 2023
Problem Statement
Let
A
B
C
D
ABCD
A
BC
D
be a square. Let
M
M
M
be the midpoint of
B
C
BC
BC
and
N
N
N
be the point on
A
B
AB
A
B
such that
2
A
N
=
B
N
2AN=BN
2
A
N
=
BN
. If the area of
△
D
M
N
\triangle DMN
△
D
MN
is 15, find the area of square
A
B
C
D
ABCD
A
BC
D
.Proposed by Harry Kim
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