Question

ABC is a triangle and PQ is parallel to BC.
BC=12.6cm, PQ=8.4 cm and AQ= 7.2 cm.
Find AC​

Answer 1

With a line parallel to a side through a triangle we get similar triangles so a proportion.

AC : BC = AQ : PQ

AC = BC AQ / PQ

AC = 12.6 (7.2) / 8.4

AC = 10.8 cm

Answer: 10.8 cm