AnswersCA-Common Core Geometry DVHS Sem. 1Symmetry

Symmetry — Unit test Answers

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1
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Which diagram has all the correct lines of reflectional symmetry for the rectangle?

A
A rectangle is folded diagonally on both corners.
Option A
B
A rectangle is folded by a vertical and horizontal line going through its center.
Option B
C
A rectangle is folded 4 ways. It is folded horizontally, vertically, and diagonally on both corners.
Option C
D
A rectangle is folded 4 ways. It is folded diagonally at each midpoint of every side.
Option D
2
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A regular polygon first maps directly onto itself after rotating 10 degrees. How many sides does the polygon have?

A
18
B
28
C
36
D
50
3

Which statements are true regarding the rotational symmetry of the shape? Select three options.

A
The order of rotational symmetry is 2.
B
The shape directly maps onto itself after a rotation of 270.
Option B
C
The smallest angle of rotational symmetry is 90.
Option C
D
The shape directly maps onto itself after a rotation of 120.
Option D
E
The shape directly maps onto itself after a rotation of 180.
Option E
4

A regular decagon has 10 sides.

Question illustration
A
5
B
10
C
15
D
20
5

Question text not available

Question illustration
A
60°
B
90°
C
180°
D
360°
6

Which statement describes the order of rotational symmetry for an isosceles triangle?

A
An isosceles triangle has an order 0 rotational symmetry because there is no angle at which it can be rotated onto itself.
B
An isosceles triangle has an order 1 rotational symmetry because it does not have all congruent angles.
C
An isosceles triangle has an order 2 rotational symmetry because it has 1 pair of congruent angles.
D
An isosceles triangle has an order 3 rotational symmetry because it has 3 angles.
7

How many more planes of symmetry does a regular pentagonal prism have than a regular triangular prism? planes of symmetry

Answer not available
8

The base of the pyramid is a rectangle that is not a square. Which statements correctly describe the symmetry of the pyramid? Check all that apply.

A
The pyramid has four planes of symmetry.
B
The pyramid has two planes of symmetry.
C
An axis of symmetry passes through the vertex and is perpendicular to the base.
D
An axis of symmetry passes through the vertex and through one of the triangular faces of the pyramid.
E
An angle that measures 90º is an angle of rotation for an axis of symmetry for the pyramid.
F
An angle that measures 45º is an angle of rotation for an axis of symmetry for the pyramid.
9

Which solids have more than five planes of symmetry? Check all that apply.cylinderscubesrectangular prismssquare pyramidsconesregular triangular prisms

A
cylinders
B
cubes
C
rectangular prisms
D
square pyramids
E
cones
F
regular triangular prisms
10

Consider the rotational symmetry of rhombus WXYZ.

Question illustration
A
1
B
2
C
3
D
4
11

A regular polygon first maps directly onto itself after rotating 22.5 degrees. How many sides does the polygon have?

A
8
B
11
C
16
D
45
12

Question text not available

Question illustration
A
axis of reflection
B
axis of symmetry
C
plane of reflection
D
plane of symmetry

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