need help please
Provide the ordered pairs for two similar triangles on the coordinate plane. Explain, using complete sentences, how you know these triangles are similar.

Question

need help please 
Provide the ordered pairs for two similar triangles on the coordinate plane. Explain, using complete sentences, how you know these triangles are similar.

anonymous · Answer

i already  got the coordinates i just wanna know its similar

mathstudent55 · Answer

You have the coordinates of one triangle or of both triangles?

anonymous · Answer

Well, did you draw them out? Do they look excatly the same?

anonymous · Answer

no they look similar one is a little bit bigger than the other

anonymous · Answer

both of the triangles

mathstudent55 · Answer

One way to check is use the distance formula to find the lengths of all 3 sides of one triangle. Then again, use the distance formula to find the lengths of all 3 sides of the other triangle. Then make sure that all sides of the larger triangle are in the same ratio to the corresponding sides of the smaller triangle.

anonymous · Answer

Than they are not congruent if one is bigger.

mathstudent55 · Answer

@Zelda  They have to be similar, not congruent.

anonymous · Answer

oh ok thanks

anonymous · Answer

Oh okay then, as long as the angles are equal, then they are similar.

anonymous · Answer

wait do i use the distance formula to prove that they are similar?

mathstudent55 · Answer

The distance between points P1(x1, x2) and P2(x2, y2) is:

$$d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$$