Geometry SOL Review G.3 c,d Transformations and Symmetry

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to produce a new shape.

Front

What are the four main types of transformations?

Back

The four main types of transformations are translation, rotation, reflection, and dilation.

Front

Define reflection in geometry.

Back

Reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is rotational symmetry?

Back

Rotational symmetry is when a shape can be rotated around a central point and still look the same at certain angles.

Front

What is a line of symmetry?

Back

A line of symmetry is a line that divides a shape into two identical parts that are mirror images of each other.

Front

Give an example of a shape with no line of symmetry but has rotational symmetry.

Back

A parallelogram has rotational symmetry but no line of symmetry.

Front

What is point symmetry?

Back

Point symmetry means that for every point in a shape, there is another point at an equal distance from a central point but in the opposite direction.

Front

How do you perform a dilation?

Back

A dilation is performed by multiplying the coordinates of a point by a scale factor.

Front

What is the scale factor in dilation?

Back

The scale factor is a number that scales, or multiplies, the dimensions of a shape during dilation.

Front

How many lines of symmetry does a square have?

Back

A square has 4 lines of symmetry.