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Posts tagged with pi

More Pi

July15

What is remarkable is that π occurs in a wide variety of mathematical settings and across all mathematical domains. It turns out that is the ratio of a circle’s area to the area of a square constructed on the circle’s radius. It is also the ratio of a sphere’s surface area to the area of […]

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Pi – Reimagined by Daniel Tammet

July3

Daniel Tammet’s first language is Numbers and he decided to learn the ‘poem’ of Pi. And he had the opportunity (at the age of 25) to recite Pi to an audience at Oxford University—for over 5 hours! Listen to Daniel as he tells us about a different pi from the one taught in classrooms. Every […]

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Pi, Sin, Cos and Tan

February16

Here’s a summary of ratios – circumference divided by diameter and sin, cos and tan in right-angled triangles. Grassroots math for all junior students. OK, let’s get into it:

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Free PPT on History and Exploring Pi

July10

Pi is one of the main attractions inside the Secret Garden of Mathematics. Pi is delightful, mysterious, simple, yet profound. Pi contains the name of the person you will marry, where you will live and, perhaps, your favourite song. Share this free ppt with your teacher or with your class. Change it to fit the […]

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Explaining Area, Pi, etc. with real Pizza!

June11
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Chewing Gum unlocks DNA and Mathematical Codes

December18

Lola, a young girl who lived in Denmark 5,700 years ago, had blue eyes, dark skin and dark hair. Her last meal included hazelnuts and mallard duck but no milk – she couldn’t stomach dairy. And the reason we know any of this is because she chewed on birch pitch, a material that functioned a […]

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Reflecting on Pi

November5

Learn more about Reflection here!

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Pi Day comes first in NZ

March14

Yes, it’s true – Pi Day does come early in New Zealand, and a day later for our students in the USA. Other than being able to find your birthday in Pi, why is Pi important enough to deserve a day of its own — and a search engine to draw attention to it? Click […]

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Wacky Pi Day Activities…

March14

Wacky Pi Day activities, just in from Time.com: • In New York City, hundreds are expected to gather around a park fountain at 9:26 a.m. and with glow sticks in hand at 9:26 p.m. (to represent pi as 3.1415926) in an event organized by the National Museum of Mathematics (MoMath). • Lovebirds can get married […]

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Why don’t tape measures show √2?

March3

Your boss asks you to cut a length of wood exactly to √2. So, you get out your tape measure and ….what? There is NO √2! There should be though? After all, √2 is an exact length!! It was worked out on a calculator so you should be able to measure it? Why don’t rulers […]

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Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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