What is the length of bc?
9 units
11 unts
15 units
16 units

15 units

Step-by-step explanation:

It's hard to see, but if you click on the picture, you will see that angle ACB is actually a right angle, and therefore 90 degrees.  Therefore, you can use the pythagorean theorem here.   = + .  Since AB = 17 and AC = 8 from the given figure, using the pythagorean theorem, gives = + .  After rearranging the equation, this will give 289 - 64 = .  Then you get 225 = .  Taking the square root of both sides gives 15 = BC.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl