Archive
7th of September 2015
Mathematics
Q:

PQR is a triangle right angled at P. if PQ =10 cm and PR=24 cm ,find QR.

How can i solve this question

Ramchsai_65 - CBSE - Class VII

Monday, September 07, 2015 at 18:41:PM

A:

Hi,

If PQR is a triangle right-angled at P, then QR is the hypotenuse.

begin mathsize 14px style P Q equals 10 space c m space a n d space P R space equals space 24 space c m B y space P y t h a g o r a s space t h e o r e m comma space w e space h a v e P Q squared plus P R squared equals Q R squared 10 squared plus 24 squared equals Q R squared 100 plus 576 equals Q R squared 676 equals Q R squared Q R equals 26 space c m end style

begin mathsize 14px style P Q equals 10 space c m space a n d space P R space equals space 24 space c m B y space P y t h a g o r a s space t h e o r e m comma space w e space h a v e P Q squared plus P R squared equals Q R squared 10 squared plus 24 squared equals Q R squared 100 plus 576 equals Q R squared 676 equals Q R squared Q R equals 26 space c m end style

Monday, September 07, 2015 at 18:43:PM