Congruency & Lines of Symmetry

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

How many lines of symmetry does a square have?

Back

A square has 4 lines of symmetry.

Front

How many lines of symmetry does a circle have?

Back

A circle has an infinite number of lines of symmetry.

Front

What does it mean for two shapes to be congruent?

Back

Two shapes are congruent if they have the same size and shape.

Front

How can you tell if two shapes are congruent?

Back

You can tell if two shapes are congruent by superimposing one shape over the other; if they match perfectly, they are congruent.

Front

How many lines of symmetry does a triangle have?

Back

A triangle can have 0, 1, or 3 lines of symmetry, depending on the type of triangle.

Front

What is an example of a shape with no lines of symmetry?

Back

An irregular shape, such as a scalene triangle, has no lines of symmetry.

Front

If a shape has 2 lines of symmetry, what could it be?

Back

A rectangle is an example of a shape that has 2 lines of symmetry.

Front

What is the relationship between congruent shapes?

Back

Congruent shapes have the same dimensions and can be transformed into each other through rotation, reflection, or translation.

Front

Can two shapes be congruent if they are different colors?

Back

Yes, color does not affect congruency; two shapes can be congruent regardless of their color.