Question

There is given the numbers equals to 8 and DC equals to 3.2 and BE quals to 9 and find BC ​

Answer 1

Given:

Consider
in triangle ABC and
.

To find:

The length of BC.

Solution:

Basic proportionality theorem (BPT): If a line intersect the two sides of triangle and parallel to the third side, then that line intersects the other two sides proportionally.

Using Basic proportionality theorem, we get

On cross multiplication, we get

Now,

Therefore, the length of side BC is 12.6 units.