Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Lines
A
B
AB
A
B
and
C
D
CD
C
D
intersect at
O
O
O
. If
∠
A
O
C
=
3
x
−
20
∘
\angle AOC = 3x - 20^{\circ}
∠
A
O
C
=
3
x
−
2
0
∘
and
∠
B
O
D
=
2
x
+
25
∘
\angle BOD = 2x + 25^{\circ}
∠
B
O
D
=
2
x
+
2
5
∘
, find the value of
x
x
x
. a) 35 b) 45 c) 25 d) 65
Browse the problem library