Checking understanding of similarity

12 questions

1. Two shapes are ___ if the only difference between them is their size. Their side lengths are in the same proportions.
2. The __________ is the multiplier between similar shapes that describes how large one shape is compared to the other.
3. Which rectangle is a correct enlargement of of rectangle R?
4. Triangle A has been enlarged by a scale factor of 2 to get triangle B. Match each unknown length from triangle B with its size.
5. A square has length 8 cm. It is enlarged by a scale factor of 1\over{2}. The side length of its image is ___ cm.
6. Each angle in an equilateral triangle is 60°. If an equilateral triangle is enlarged by a scale factor of 2, each of its angles will be ___°.
7. A property of a shape is ___ if that property has not changed after the shape is transformed.
8. A shape is being enlarged by a scale factor of 4. One vertex is 3 cm from the centre of enlargement. Its corresponding vertex on the image will be ___ cm from the centre of enlargement.
9. Sofia is enlarging the shape by a scale factor of 2. Which vertex has Sofia plotted incorrectly?
10. A parallelogram is enlarged by a scale factor of 3. Which of the following measurements will remain invariant?
11. The two triangles are similar. The value of x is ___.
12. A triangle has a base of 6 m and height of 2 m. A similar triangle, in the same orientation, has a base of 15 feet. Its height is ___ feet.

License: OGL