Question

If $B$is the mid point of $AC$and $C$ is the mid point of $BD$, where $A,B,C$$,D$ lie on a straight line , say why $AB=CD$?

Answer 1

We have been given that,

$B$ is the midpoint of $AC$

$AB=BC...\left(i\right)$

$C$ is the midpoint of $BD$

$BC=CD...\left(ii\right)$

Hence, from equation$\left(i\right)$and equation$\left(ii\right)$we can say that $AB=CD$