Symmetry Congruence Regular Polygons

How many lines of symmetry are there on an equilateral triangle?

• 0

• 1

• 2

• 3

REGULAR in math terms means...

• Normal

• Two sides have the same length

• All sides are equal and all angles are equal

• It has right angles

This is an equilateral triangle. What kind of polygon is it?

• Regular Polygon

• Irregular Polygon

How many lines of symmetry does this shape have?

• 1

• 2

• 4

• 8

What is the smallest degree of rotational symmetry?

• 90°

• 72°

• 60°

• 40°

What is the smallest degree of rotational symmetry?

• 90°

• 45°

• 60°

• 120°

Which of the following transformations carry this regular polygon onto itself?

• Rotation of 36 degrees counterclockwise

• Rotation of 72 degrees counterclockwise

• Rotation of 90 degrees counterclockwise

• Rotation of 60 degrees counterclockwise

How many lines of symmetries does the regular polygon have?

• 1

• 3

• 6

• 7

Which of the following transformations carry this regular polygon onto itself?

• Rotation of 144 degrees counterclockwise

• Rotation of 120 degrees counterclockwise

• Rotation of 90 degrees counterclockwise

• Rotation of 64 degrees counterclockwise

Identify the apothem of this regular pentagon?