If in circle a is 60°, what is m∠bdc?

a. 60
b. 45
c. 30
d. 25

D.25

Step-by-step explanation:

If  in circle A is 60°, what is m∠BDC?

A.  60°

B.  45°

C.  30°

D.  25°

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