Question

plz solve the following ​

Answer 1

Answer:

Step-by-step explanation:

by basic proportionality theorem in TRIANGLE ABC

CD/AC = CE/EB     (as DE║AB)                ...(i)

by basic proportionality theorem in TRIANGLE CDB

CF/CD = CE/EB      (as FE║DB)              .....(ii)

using i and ii

CD/AC =CF/CD       (as both are equal to CE/EB)

now take CD to Left Hand Side

            & AC to Right Hand Side

therefore

         $CD^{2}$= AC×CF

HENCE PROVED

HOPE THIS ANSWER WAS USEFULL AND ALL THE BEST FOR YOUR BOARDS