Question

triangle ABC is similar to triangle DEF and their areas respectively 64 cm^2 and 81cm^2 if DE=9cm find AB

Answer 1

Answer:

8 cm.

Step-by-step explanation:

By Basic Proportionality theorem

Area of ABC\Area of DEF=(AB\DE)²

⇒64\81=AB²\81

⇒AB=√64

∴AB=8 cm.