When are triangles considered similar? a. corresponding angles are equal and corresponding sides are proportional c. corresponding angles are equal or corresponding sides are proportional b. corresponding angles are proportional and corresponding sides are equal d. corresponding angles are proportional or corresponding sides are equal?

correct answer is option C. (corresponding angles are equal or corresponding sides are proportional)

Step-by-step explanation:

Suppose there are two triangles ΔABC and ΔDEF as shown in figure then

These two triangles will said to be similar if

∠A=∠D

∠B=∠E

∠C=∠F

second condition:

If corresponding sides of ΔABC and ΔDEF are proportional or in other words If the ratio of corresponding sides of  ΔABC and ΔDEF is equal then the triangles ΔABC and ΔDEF are similar.

corresponding sides of ΔABC and ΔDEF are proportional means

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72