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In the following figure, point D divides AB in the ratio 3: 5. If BC = 4.8 cm, find the length of DE.
In the following figure, point D divides AB in the ratio 3: 5. If BC = 4.8 cm, find the length of DE.
Class 10 | Exercise 15B | ICSE | Maths | Selina | Similarity (With Applications to Maps and Models)
In the following figure, point D divides AB in the ratio 3: 5. If BC = 4.8 cm, find the length of DE.

Selina Solutions Concise Class 10 Maths Chapter 15 ex. 15(B) - 1

Solution:

Because, \[\vartriangle ADE\text{ }\sim\text{ }\vartriangle ABC\text{ }by\text{ }AA\] criterion for similarity

So, we have

\[AD/AB\text{ }=\text{ }DE/BC\]

\[3/8\text{ }=\text{ }DE/4.8\]

So,

\[DE\text{ }=\text{ }1.8\text{ }cm\]

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