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by BlastRoom
Identify rigid motions and use them to justify congruence.
#geometry
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
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Among a translation 5 units right, a dilation with scale factor 2, a horizontal stretch by 3, and a dilation with scale factor 1/2, which always preserves side lengths and angle measures?
Triangle ABC maps to A'B'C' by reflection across the x-axis. What can be said about corresponding side lengths and angle measures?
Quadrilateral WXYZ is rotated 90 degrees about point P. Which property must remain unchanged?
A figure is transformed by a dilation centered at O with scale factor 3. What happens to distances between points?
A line segment is reflected across line m and then reflected back across the same line m. Which statement is true about its final length?
Triangle ABC is graphed. It maps to the image shown. Which transformation maps the preimage to the image?
A figure is turned 180 degrees around its center. What kind of transformation was applied?
Segment AB is 7 cm. After a rigid motion, its image is A'B'. What must A'B' equal?
Triangle ABC maps to triangle DEF by a translation followed by a rotation. Which conclusion is justified?
A rectangle is reflected across the y-axis and then translated 4 units down to match another rectangle. What does this prove?
Pentagon P maps exactly onto pentagon Q by rotating 60 degrees about O. Which explanation supports P ≅ Q?
Triangle MNO is reflected across line k, then reflected across line l, and lands on triangle RST. Which conclusion follows?
A preimage quadrilateral is translated left 2 units and down 5 units to become its image. Why are the two quadrilaterals congruent?
Triangle ABC maps to A'B'C' by rotating 90 degrees about the origin and then reflecting across the x-axis. What is justified?
A student says two triangles are congruent because one maps to the other by a flip, then a slide. What vocabulary best describes the student's reason?
A figure is reflected across line n, translated, and then rotated to land on another figure. Which measurements are guaranteed equal?
Figure F maps to figure G by a dilation with scale factor 2 followed by a translation. What conclusion is supported?
Triangle JKL is enlarged by a dilation with scale factor 1.5, then rotated 30 degrees. Why does this not prove congruence to its image?
A square maps to another figure by a horizontal stretch with factor 2, then a reflection. What conclusion can be made?
A figure is dilated with scale factor 1/2 and then translated to overlap another figure's position. What does the sequence show?
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Triangle Angle Sum and Exterior Angles
40 questions
