Question

How to prove it ? Please anyone help me with this question​

Answer 1

Infer: to prove... a

$a ^{2} + b ^{2} = c ^{2} + d ^{2}$

sides c=d as perpendicular bisector

name PD as l

$a^{2} + c^{2} = {l }^{2}$

likewise,

$b ^{2} + {d}^{2} = {l}^{2}$

These 2 eqns infer ...

${a }^{2} - {b}^{2} = {d}^{2} - {c}^{2}$

Hence proveddd ✌✌