Are the triangles similar? How do you know?

Answer:
They are similar because triangle AMY has sides double the size of CED. If you divide AMY's triangle sides by 2, you will have a triangle that is the exact size of CED. :)
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Answer:
The triangles are similar
Step-by-step explanation:
To tell whether the triangles are similar or not we can compare their side lengths
if the triangle are similar then their side lengths' will be proportional:
MY/CD = AY/ED
10/5 = 8/4 cross multiply expressions
40 = 40 as we can see from this result, the side lengths are proportional so we can say these triangles are similar