Question

i am leaving brainly so am giving away points,,, this community should be ashamed of themselves
nobody cares about helping others only about points, what will you do with points? People actually come here to get help and other people who have nothing better to do in life just spam

Answer 1

Answer:

$\huge\color{pink}\boxed{\colorbox{Black}{❥ Answer}}$

Quadrilateral PQRS has angle bisectors PT,QA,RA,SC.

ΔPQB,ΔQBT,ΔSDC are right angled triangle.

Let angle P=2x

so, ∠PQB=90−x=∠BQT

∴∠QTB=(90−(90−x))=x

∠CTR=180−x

In triangle SDR,

∠RDS=90∘, in parallelogram DCTR

∠DCT & ∠CDR=90∘

∴∠DRT=x & ∠DRS=x

∴∠DSR=90−x

sum of adjacent angles, ∠P+∠Q=180∘

Opposite angles ∠P=∠R,∠Q=∠C

∴ PQRS is parallelogram

Answer 2

No, carbonic acid is not a strong acid. H2CO3 is a weak acid that dissociates into a proton (H+ cation) and a bicarbonate ion (HCO3- anion). This compound only partly dissociates in aqueous solutions.