Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Lines and intersect at point
MATHEMATICS · Subjective · A Level · Mathematics · Proof · Proof
Problem
Lines
A
B
AB
A
B
and
C
D
CD
C
D
intersect at point
O
O
O
. Write a paragraph proof to show that
∠
A
O
C
=
∠
D
O
B
\angle AOC = \angle DOB
∠
A
O
C
=
∠
D
O
B
.
Related theory
Lines and Angles
Mathematical Logic
Algebra
Browse the problem library