The WHY behind Area of a Circle

In Mathematics this week, we have continued our study of the measurement strand.

The Pythagoras Group has been looking specifically at:

Perimeter and area of a: square, rectangle, triangle and circle (circumference)

Volume of a: cube, rectangular prism, triangular prism, cylinder and cone

The Pythagoras group has been learning Karate Maths to help them remember the formulas for each (ask your child to demonstrate!).  It is important however, that we understand the WHY for each... this is not so easy!

Below is a video that helps to explain the WHY behind the area of a circle.  Check it out!    

Area of a Circle

 

Thanks, Mrs P.

Khan Academy Measurement Videos

This is the final week of our measurement unit.  Watch the videos below in preparation for your post-test in Week 9, and remember to practise your Karate Maths. 

Circumference of a circle

Area of a circle

Volume and surface area of a cylinder

Volume of a cone

Kilometers

For those wanting to travel tomorrow morning.  I am currently in Gore.  You are allowed to use a maximum of 250 kilometers tomorrow. You need to write your current location and the amount of kilometers you wish to use to your new location and have this on my desk before the 8:50am bell.

Good luck!

Mathletics

This has been set for this week. 

Reminder: Swimming and Oral Language tomorrow!

In an enclosed basement
I'm dirty and scruffy and far from home.

I scream, I shout,
but there is no use as I am far from home.

I'm scared, I'm frightened and miss my home.

The feel the heavy chains on my weak hands
the growl in my stomach gets louder and louder.

I'm lost and far from home
no food in my tummy, no water to drink.

I'm enclosed in this basement
no fresh air to breath
I long to be free.

I'm lost and far from home...


By Emily White! 

This week Room 19 has read about Amiri  Baraka who was an activist in the Black Arts movement of the 1960's.  He wrote several poems and plays. 

After finishing our reading we read one of his poems about how African-Americans were treated and what they went through as slaves.

This was the inspiration for our writing:




I touch the cold and dirty chains surrounding me
I watch through a barred window
at the black,
collecting water, herding sheep and getting beaten.

I long for my family
though far away
they can't be reached
As night falls I scrub the floors
until they glisten and gleam.

I settle on a stone floor
and close my eyes
I think of freedom
of being white
As the darkness fades and sunlight comes...

More demands fill the air
along with cries of fear
I watch as everything dies
along with my hope
and wait for my time to be over.

By Holly Reid

There not their! Sorry!

Today's Filming

Filming

 I have just been viewing the footage from today.  We have some excellent footage and several funny bloopers! Well done to all involved today.  I am impressed with your efforts! 

Actor of the today goes to Pongo (Emily). 
Word of the day goes to Cheeky Hobson (Rosie)  Perfect!

Tomorrow we are back to a regular classroom routine.

 Reminder that the science Icas is on at 9:30am tomorrow.

Question of the day: Why are their 366 days in a leap year?


Thanks,

Mr P

Mathletics has been set for this week.  To the 7 students in rooom 19 who did not complete any of their homework last week... See you tomorrow!!!

Reminder we have the measurement pre test in the morning.  Following the test we are filming scene 2 and 3.

200 kilometers to any student who brings in a colgate carton tomorrow

Thanks,

Mr P