Question

in triangle abc similar triangle pqr and area of triangle ABC equal to 121 CM square area of triangle pqr 81 CM square. BC equal to 3.3 cm find the value of QR

Answer 1

A(∆ABC). (BC)²
-------------- = ----------
A(∆PQR). (QR)²

121. ( 3.3)²
----= -----------
81. QR²

=>√121/√81= 3.3/QR
=>11/9=3.3/QR
=>QR= (3.3×9)/11= 0.3×9= 2.7 cm will be the answer