Transformations - 8th Grade

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a figure the same distance in the same direction.

Front

How do you translate a point (x, y) 3 units left and 9 units down?

Back

The new coordinates will be (x-3, y-9).

Front

What is the result of translating the point A (-3, 4) right 5 and up 1?

Back

The new coordinates are (2, 5).

Front

What is dilation in geometry?

Back

Dilation is a transformation that changes the size of a figure but not its shape, using a scale factor.

Front

What does a scale factor of 3 mean in dilation?

Back

It means that every point of the figure is moved away from the center of dilation by a distance that is 3 times its original distance.

Front

Which transformations preserve congruence?

Back

Translation, rotation, and reflection preserve congruence.

Front

Which transformation does not preserve congruence?

Back

Dilation does not preserve congruence.

Front

If point B (0, 4) is dilated by a scale factor of 3, what are the new coordinates?

Back

The new coordinates are (0, 12).

Front

What is the effect of translating a triangle 2 units to the right and 5 units down?

Back

The new coordinates of each vertex will be (x+2, y-5).

Front

How do you determine the new position of a point after a translation?

Back

Add the translation values to the original coordinates.