Twelve Dots

 

 

Source:@JustinAion

Google Drive

Pythagoreas' Dream

 

  

The total area of white squares around the right-angled triangle is 450 square meters. 

Find the area of the triangle. 

altered from nRich

Honeycomb Triangles 2 (Hosoya's Triangle)

 

1. What patterns do you see in the above system?
2. Complete the missing hexagons. (until the row with 144, 89, ...)
3. What other patterns can you identify?

 

 

 

Honeycomb Triangles 1

 

Blaise Pascal was another famous mathematician who in 1653 published his work on a special triangle following a specific pattern.  This became known as Pascal’s triangle, even though many other cultures have studied this pattern thousands of years before.  The observations made from Pascal’s triangle has led to patterns related to probability and statistics, which we will explore later in the semester.

Take a look at Pascal’s triangle.  The first number starts with a 1. Then continue to place the number 1 on the left and right edge of each number 1 from above.  To obtain the missing number below, you add the two adjacent numbers above them. For example, you add the adjacent numbers 1 and 2 to obtain 3 below them.  Fill in the rest of the triangle.

 

1. Write down a few observations and patterns.  Share your observations with your group. Try to get as many observations as you can.
   
2. What happens if you color in all the odd numbers and even numbers.  What do you notice?
3. Describe where you can find these sets of numbers found in Pascal’s triangle.  Some are very easy to pick out, others may be identified by adding some of the cells together in a specific pattern.
   1. Natural numbers
   2. Fibonacci numbers
   3. Multiples of 2
   4. Multiples of 3
   5. Powers of 2: 2, 3, 8, 16
   6. Triangular numbers
   7. Square numbers
   8. Hexagonal numbers
   9. Hockey stick pattern
   10. Other patterns?

 

Resource:Mary Ann Esteban

 

Square area

 

Source: @SWCHS_Maths

 

 

 

 

 

Newsletter Issue 14

 

Significant Figures - Issue 14 [Download]

Donkey and the Lake

 

source: @Math26039335

 

 

 

 

 

 

 

 

 

How many triangles?

 I took this lovely activity from Nolan Fossum's tweet. 

Pythagorean Triplets Card Sort 2

 On Jamboard, work with your group friends to organize the following cards into Pythagorean triplets.

 

 

Part 1 (with cards)

Rugby Fixture Puzzle

 

Source: Rob Eastaway, New Scientist

 

Good Things Have Been Increasing

Source: DUSA and GAPMINDER

 

Bad Things Declining

Source: DUSA and GAPMINDER

 

Treasure Island

Use the same map for two different tasks given:

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Task 2

 

A Path Puzzle 2

 

The illustration shows eight houses and their front doors. The problem is to draw a line from the door of A to the door of another line that joins the doors of B and B', a third line that joins C to C', and a fourth that joins D to D'. No line may cross another line, pass through the sides of a house, or cross the outside rectangular border of the picture. The problem may seem impossible to solve, but it can be done.

Source: The Tokyo Puzzles

A Path Puzzle

 

Source: The Tokyo Puzzles

 

Make Triangles

Source: The Tokyo Puzzles

 

Stars Puzzle

 

At least how many stars should you move so that each row and each column has three stars?

source: Emrehan Halıcı

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