Question

Find the value of mn if ab= 9cm, bc= 7.2cm, and LM= 12cm

Answer 1

9.6 cm

Explanation:

Since the shapes are similar, we can write a proportion. Let x be the length of MN.

9/12 = 7.2/x Write a proportion.

9x = 12(7.2) Use cross products.

9x = 86.4 Multiply.

x = 9.6 Divide both sides by 9.

Side MN is 9.6 cm.