Question

let triangle ABC similar to triangle DEF area of triangle ABC = to 169 cm square and area of triangle DEF = 121 CM square if ABequals to 26 CM then find DE?

Answer 1

$\frac{abc}{def} = \frac{26 \times 26}{de \times de}$
now solve it u will get your answer

Answer 2

Answer:

Step-by-step explanation:

It is given that Δ ABC is similar to ΔDEF and the area of =$169cm^{2}$ and area of Δ DEF=$121cm^{2}$, AB=26cm,then using the property of similar triangles,

$\frac{arABC}{arDEF}$=(\frac{AB}{DE})^{2}[/tex]

$\frac{169}{121}=(\frac{AB}{DE})^{2}$

$\frac{676{\times}121}{169}$=DE^{2}

$\frac{81796}{169}=DE^{2}$

$DE=22 cm$