Question

let ∆ABC ∆DEF are their areas be respectively 64cm² and 121cm² if EF=15.4 ,find Bc​

Answer 1

Step-by-step explanation:

This is ur ans.

I hope it will helps u

Answer 2

∆ ABC ~ ∆ DEF

= area \frac{∆ABC}{∆DEF} = ( \frac{BC}{EF}) {}^{2}

= \frac{64}{121} = (\frac{BC}{15.4} )^{2}

= BC = \sqrt{ \frac{64}{121} } \times 15.4

= BC = \sqrt{ \frac{8}{11} } \times 15.4

= BC = 11.2 cm