Question

Triangle ABC similar triangle PQR area of triangle ABC = 81 cm square area of triangle PQR =121 cm square . If BC =6.3 cm. Find QR

Answer 1

we know that
$(area \: of \: triangle \: abc) \div (area \: of \: triangle \: pqr) = (ab \div pq)^{2} = (bc\div \: qr)^{2} = (ac \div pr)^{2}$
given that area of triangle abc= 81cm^2
and area of triangle pqr = 121cm^2
and bc = 6.3 cm
then...
$81 \div 121 = (bc \div qr)^{2} \\ \sqrt{81 \div 121 } = 6.3 \div qr \\ 9 \div 11 = 6.3 \div qr \\ qr = 11 \times 6.3 \div 9 \\ qr = 63.3 \div 9 \\ qr = 7.7$
so qr = 7.7 cm
HOPE THIS HELPS YOU

Answer 2

Answer:

REFER THE ATTACHMENT

Explanation:

REFER THE ATTACHMENT