Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
In quadrilateral
A
B
C
D
ABCD
A
B
C
D
,
∠
A
=
70
∘
\angle A = 70^\circ
∠
A
=
7
0
∘
and
∠
C
=
110
∘
\angle C = 110^\circ
∠
C
=
11
0
∘
. If
∠
C
B
D
=
45
∘
\angle CBD = 45^\circ
∠
C
B
D
=
4
5
∘
, then
∠
C
A
D
\angle CAD
∠
C
A
D
equals a)
50
∘
50^{\circ}
5
0
∘
b)
45
∘
45^{\circ}
4
5
∘
c)
40
∘
40^{\circ}
4
0
∘
d)
65
∘
65^{\circ}
6
5
∘
Browse the problem library