Question

HEY PLZ ITS URGENT... TOMORROW IS MY EXAM...

I WILL MARK YOU AS BRAINLIST....​

Answer 1

Answer:

Step-by-step explanation:

IN ΔAOB AND ΔCOD

∠AOB = ∠COD (90)

OA=OC

OB=OD

BY SAS CRITERIA

ΔAOB≅ACOD

THEREFORE AB=CD

IN ΔAOD AND ΔBOC

∠AOD=∠BOC

OA=OC

OB=OD

BY SAS CRITERIA

ΔAOD≅ΔBOC

THEREFORE AD=BC

NOW INΔACD AND ΔABC

AD=BC

CD=AB

AC=AC

BY SSS CRITERIA

ΔACD ≅ ΔABC

THEREFORE ∠B =∠D

AB = AD

WE KNOWN THAT SUM OF OPPOSITE ANGLES IS 180

∠B+∠D=180

2∠B=180

∠B=90

THEREFORE ∠D=90

SIMILIARLY ∠A = ∠C =90

NOW

AB=BC=AD=BD

∠A=∠B=∠D=∠C=90

HENCE IT IS A SQUARE