Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
The diagonals
A
C
AC
A
C
and
B
D
BD
B
D
of a parallelogram
A
B
C
D
ABCD
A
B
C
D
intersect at
O
O
O
. What is the ratio
ar
(
△
A
O
B
)
:
ar
(
A
B
C
D
)
\text{ar}(\triangle AOB):\text{ar}(ABCD)
ar
(
△
A
O
B
)
:
ar
(
A
B
C
D
)
? a)
1
:
2
1:2
1
:
2
b)
1
:
8
1:8
1
:
8
c)
1
:
4
1:4
1
:
4
d)
1
:
3
1:3
1
:
3
Browse the problem library