MathDB

Tuymaada 2021/ J2

Source: Tuymaada 2021/ J2

July 30, 2021

geometry

Problem Statement

The bisector of angle

B

of a parallelogram

ABCD

meets its diagonal

AC

at

E

, and the external bisector of angle

B

meets line

AD

at

F

.

M

is the midpoint of

BE

. Prove that

CM // EF

.

Back to Problems View on AoPS