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4 years, 5 months ago
4 years, 5 months ago
19.2 is thee length of ps..... direct formula of this case is pq*qr=rs*ps
3 years, 10 months ago
how do we get to know that we have to take PQ×QR=SR×PS and not QR×SR=PQ×PS???
4 years, 5 months ago
The length of PS is equal to QR= 12.8.
Proof: Suppose the two diagonals PR and QS bisect at O. Then since the diagonal bisects QS so PO=OR, OS=OQ and angle POS= angle QOR (vertically opposite) So the two triangles are congruent (SAS congruency) So QR=PS
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