Question

Examine the triangles, which are similar.

The first triangle has a side length of 21 meters, which corresponds to the second triangle's side of 3 meters. The missing side of the first triangle corresponds to a side of 8 meters on the second triangle.

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How many meters long is the missing side?

Note: The triangles may not be drawn to scale.

Enter your answer as a number, like this: 42

Answer 1

The answer is 56.

Explanation:

According to the text, 21 corresponds to 3 (the side lengths). The relationship between them is 7 (3x7=21). Now, 3 was a side length of the second triangle, like 8 is. To find the missing side of the first triangle, do 8x7, which will give you 56.

Hope that helps!