Question

Construct triangt PQR whose Perimeter
is 8.4cm and PQ : QR : PR = 5:7:9​

Answer 1

let the sides be x

perimeter = 5x +7x+9x

84= 21x

84/21= x

4 = x

so, 5×4= 20cm

7×4=28cm

9×4=36cm

Answer 2

sorry I don't know the answer