GM-U3.4 Lesson Check: Reflective & Rotational Symmetry

Front

What is the formula to find the smallest angle of rotation that maps a regular polygon to itself?

Back

Front

How many lines of symmetry does a trapezoid have?

Back

0

Front

What is the order of rotation for a shape that can be rotated 90° to map onto itself?

Back

Order = 4, 90°

Front

What angle can rotate a regular polygon back onto itself if the polygon has 3 vertices?

Back

120°

Front

What angle can rotate a regular polygon back onto itself if the polygon has 5 vertices?

Back

72°

Front

Define reflective symmetry.

Back

A shape has reflective symmetry if it can be divided into two identical halves that are mirror images of each other.

Front

Define rotational symmetry.

Back

A shape has rotational symmetry if it can be rotated around a central point and still look the same at certain angles.

Front

What is the relationship between the number of vertices and the angle of rotation for regular polygons?

Back

Front

How do you determine the number of lines of symmetry in a regular polygon?

Back

A regular polygon has as many lines of symmetry as it has sides.

Front

What is the order of rotation for a shape that can be rotated 180° to map onto itself?

Back

Order = 2, 180°.