Math Problem Statement

Here is a figure that looks like the letter A along with several other figures. Which figures are scaled copies of the original triangle? Explain how you know.

Solution

The problem you're working on involves identifying which of the figures are scaled copies of the original triangle labeled as "Figure A."

To determine whether a figure is a scaled copy, we need to check if the corresponding sides of the figures have proportional lengths and if the angles are congruent.

Let's analyze each figure:

  1. Figure 1 - This figure appears to be rotated but has the same shape and proportion as Figure A. Since rotation does not affect scaling, Figure 1 is likely a scaled copy of Figure A.

  2. Figure 2 - This figure seems to have larger side lengths but retains the shape and angle measures of Figure A. This suggests that Figure 2 is a scaled copy of Figure A.

  3. Figure 3 - This figure looks different in shape and orientation, and the proportions do not seem to match those of Figure A. This figure is likely not a scaled copy of Figure A.

  4. Figure 4 - This figure has the same orientation and shape as Figure A, but it might be smaller. If the side lengths are proportional, Figure 4 is a scaled copy of Figure A.

So, Figures 1, 2, and 4 are scaled copies of the original triangle, Figure A.

Would you like a more detailed explanation or have any specific questions about this problem?

Related Questions:

  1. How can you verify that two triangles are similar or scaled copies using side lengths and angles?
  2. What transformations (like rotation, reflection, or translation) preserve the scale of a figure?
  3. How does scaling affect the area of a figure compared to the original?
  4. If Figure 4 was reflected instead of rotated, would it still be a scaled copy of Figure A?
  5. How would the perimeter of a scaled copy compare to the perimeter of the original triangle?

Tip:

When checking if two shapes are scaled copies, always verify both the proportionality of corresponding side lengths and the congruence of corresponding angles.

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Math Problem Analysis

Mathematical Concepts

Geometry
Similarity
Proportionality
Transformations

Formulas

Proportionality of side lengths
Angle congruence

Theorems

Triangle similarity theorem
Properties of transformations (rotation, reflection, scaling)

Suitable Grade Level

Grades 7-9