The transformation that preserves both distance and angle measure is called a rigid transformation, which includes translations, rotations, and reflections.
In this case, the graph that demonstrates a transformation that preserves both distance and angle measure is the second option:
Two equivalent triangles are plotted on a coordinate plane, one in quadrant 1 and one that starts in quadrant 2 and crosses into quadrant 1.
Explanation:
- Equivalent Triangles: The two triangles are described as equivalent, meaning they have the same shape and size. The property of equivalence implies that their sides are of equal length and their angles are of equal measure.
- Positioning: One triangle is in quadrant 1, while the second triangle starts in quadrant 2 and crosses into quadrant 1. This indicates a possible rigid transformation (like rotation or reflection) that does not alter distances between points or the angles between lines.
- Linear Connection: The mention of a line connecting matching vertices suggests that the transformation between these two triangles involves maintaining the congruency, supporting that the shape and sizes are unchanged, which is characteristic of rigid transformations.
In contrast:
- The first option shows two squares but involves one square situated inside another, which indicates scaling (not preserving distance).
- The third option involves two triangles of different sizes, meaning it’s a dilation transformation which does not preserve distance and angle measures between the shapes.
Thus, the second option with the equivalent triangles is the only graph that maintains both distance and angle measure, confirming it as the correct answer.