Symmetry
Which angle of rotation is an angle of rotational symmetry for all figures?
d. 360°
Which type of triangle will always have exactly 1-fold reflectional symmetry?
d. isosceles triangle
Which figure has the same order of rotational symmetry as a rectangle?
d. rhombus
How many lines of reflectional symmetry does an equilateral triangle have?
3
What is the smallest angle of rotational symmetry for a square?
90°
Which statements are true about the lines of symmetry of a regular pentagon? Check all that apply.
Every line bisects a vertex angle. Every line bisects a side. Every line is perpendicular to a side.
Which letter in the word HAPPY has an order 2 rotational symmetry?
a. H
Which triangle has 0 reflectional symmetries?
a. triangle 1
What is the order of rotational symmetry for a rhombus?
b. 2
Which figure has an order 3 rotational symmetry?
b. equilateral triangle
If the smallest angle of rotation for a regular polygon is 18°, how many sides does polygon have?
c. 20
Which set of side lengths represents a triangle with 3 lines of reflectional symmetry?
c. 5, 5, 5
A regular polygon has 15 sides. Which is a possible angle of rotational symmetry for the figure?
c. 72°
Which figure shows a line of reflectional symmetry for the letter T?
c. Figure C
How can a regular hexagon be folded to shown that it has reflectional symmetry?
c. Fold the hexagon along a line that bisects two vertex angles.
If a quadrilateral has exactly 2 lines of symmetry, and both are angle bisector a, then which statement would be true?
c. The figure must be a rhombus because it has exactly 2 pairs of congruent angles.