Last updated: October 22, 2026 · Written by the Math Made Easy math teachers
Looking for a similar figures quiz? Then this Grade 8 quiz on Congruent and Similar Figures Through Dilations asks 10 multiple-choice questions with instant feedback. Ten multiple-choice questions test dilation coordinates, scale factors, and the difference between congruent and similar figures. Work each one on scratch paper and read the explanation to see which mistake the wrong options represent.
Standards: 8.G.A.2, 8.G.A.3, 8.G.A.4 · Level: Grade 8
What this Congruent and Similar Figures Through Dilations quiz checks
- Congruent figures are related by a sequence of rigid motions only.
- A dilation about the origin sends (x, y) to (kx, ky).
- Similar figures have equal angles and proportional sides.
- The scale factor is image length divided by pre-image length.
- A scale factor of 1 changes nothing; below 1 shrinks, above 1 enlarges.
The 10 questions of the quiz
- A dilation about the origin has scale factor 2. What is the image of (3, −4)?
- What is the image of (10, −6) under a dilation about the origin with scale factor 1/2?
- Which quantity stays the same under a dilation?
- A side of 12 cm becomes 30 cm after a dilation. What is the scale factor?
- Triangle ABC is dilated about the origin to give △A′B′C′. What is the scale factor?
- Two figures are congruent. Which kind of motions are always enough to map one onto the other?
- Are triangles ABC and DEF similar? What is the scale factor from ABC to DEF?
- Which statement describes two similar figures?
- A dilation uses k = 0.4. What happens to the figure?
- Dilate (−8, 12) about the origin with scale factor 3/4. What is the image?
After the quiz
Missed a question? Reread the Congruent and Similar Figures Through Dilations lesson, then take the quiz again. Next, solve the Grade 8 worksheet on Congruent and Similar Figures Through Dilations, one star first, then two and three stars. Finally, take the chapter test under real conditions, without notes and with a timer.