# quiz

Topics: Abductive reasoning / Pages: 10 (657 words) / Published: Feb 9th, 2015
16/1/2015

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Feedback — Graded Quiz #1 (Symmetry 3 ­ Part I)

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You submitted this quiz on Thu 15 Jan 2015 6:44 PM PST. You got a score of
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Question 1
Louis Braille developed his embossed dots for the visually impaired in 1824 when he was only 15 years old. The Braille cell is a 2 x 3 point block onto which raised dots are placed.

The figure shows the grid (small black dots) and the embossed arrangement (large red dots) to represent an exclamation mark (!). The center of symmetry is shown as an orange cross.
Study the Braille alphabet and determine how many letters have point symmetry 2 with respect to the center of symmetry.

Score

Explanation
1/12

16/1/2015

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No Letters
1 Letter

1.00

2 Letters
3 Letters
4 Letters
5 Letters
Total

1.00 / 1.00

Question 2
In the letters of the Old West style alphabet how many have vertical mirror lines?

2/12

16/1/2015

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Score

Explanation

3/12

16/1/2015

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0
1
2
3
4

1.00

5
Total

1.00 / 1.00

Question 3
What is the asymmetric unit of this tessellation? The repeating tile is outlined in blue to assist your analysis.

Score

Explanation
4/12

16/1/2015

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A
B
C
D
E

1.00

F
Total

1.00 / 1.00

Question 4
Which of the flag(s) below has(ve) the highest point symmetry? Take into account flag shape and colour. Your Answer

Score

Explanation

A
C
E

1.00

B and C
A and D
Total

1.00 / 1.00

Question 5
What is the point symmetry of this tie pattern?