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India IOQM
2024-25 IOQM India
4
IOQM P4 2024
IOQM P4 2024
Source:
September 8, 2024
Problem Statement
Let
A
B
C
D
ABCD
A
BC
D
be a quadrilateral with
∠
A
D
C
=
7
0
∘
\angle ADC = 70^{\circ}
∠
A
D
C
=
7
0
∘
,
∠
A
C
D
=
7
0
∘
\angle ACD = 70^{\circ}
∠
A
C
D
=
7
0
∘
,
∠
A
C
B
=
1
0
∘
\angle ACB = 10^{\circ}
∠
A
CB
=
1
0
∘
and
∠
B
A
D
=
11
0
∘
\angle BAD = 110^{\circ}
∠
B
A
D
=
11
0
∘
. The measure of
∠
C
A
B
\angle CAB
∠
C
A
B
(in degrees) is:
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