The two triangles above are similar. What is the perimeter of the larger triangle?

Rationale

The perimeter of the larger triangle is 29.4.

The similarity of the triangles allows us to determine the perimeter of the larger triangle by using proportionality based on the corresponding dimensions of the smaller triangle. By applying the scale factor derived from the lengths of the sides, we can accurately calculate the perimeter.

A (27.6) YOUR ANSWER

This option is incorrect as it does not reflect the appropriate scale factor applied to the sides of the smaller triangle. The calculations based on the given dimensions would yield a larger result, indicating that the perimeter is underestimated here.

B (28) YOUR ANSWER

Choosing 28 as the perimeter suggests a minor adjustment but still falls short of the correct calculation. The proportional relationship between the sides of the similar triangles indicates a larger perimeter that cannot be accurately represented by this value.

C (28.8) YOUR ANSWER

While this choice is closer to the correct answer, it still fails to account for the full scale factor necessary to achieve the correct perimeter of the larger triangle. Thus, it underrepresents the true extent of the larger triangle's perimeter.

D (29.4) CORRECT

This is the accurate perimeter of the larger triangle, derived from applying the correct scale factor to the dimensions of the smaller triangle. This value is consistent with the relationships defined by the similarity of the triangles involved.

E (30.1) YOUR ANSWER

This option overestimates the perimeter of the larger triangle, indicating a miscalculation in the application of the scale factor. The resulting perimeter is not supported by the proportional relationships of the triangles.

Conclusion

In conclusion, understanding the similarity of triangles allows for the use of scale factors to calculate perimeters accurately. The perimeter of the larger triangle, determined to be 29.4, reflects the precise application of the scale factor based on the dimensions of the smaller triangle. All other options either underestimate or overestimate the actual perimeter, underscoring the importance of accurate proportional reasoning in geometric calculations.

The two triangles above are similar. What is the perimeter of the larger triangle?

The perimeter of the larger triangle is 29.4.

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