
Q13
 What does a complete revolution means?  What has it got to do with the Circumference of a circle? Tips: When you roll a coin on a flat surface, the distance travelled by the coin is the AREA of the coin or the CIRCUMFERENCE of the coin? ;p  How do we measure the distance of a circumference of a circle? Watch the animation video and the above questions will be answered! :) After watching the video, do Q13 and try Q14! 

Q15
Need more examples before trying Q14? Watch this video then! 

Q16
Let's watch this video to learn how to work backward to find the number of revolutions! ;p Do Q17! 

Putting on Your Thinking Cap! (Q18)
Is coming to the end of Circles topic! You want to challenge yourself by working on last question? ;p Tips: For the area of small square, we need to rotate it! How? Hmmmm....for you to think out of the Box! :) Try it before watching the video ya! :) 
p6_circle_2__cut_paste_online_student.pdf  
File Size:  342 kb 
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Learn the areas of 2 more shapes that are commonly seen in Circle questions! They are Area of Boomerang and Area of Halfleaf!
If you have learnt on these 2 shapes in school, you may skip this video :) 

Q3c & Q3b
Let's learn how to see Area of Halfleaf (Q3c) and Area of Boomerang (Q3b > Only hints are given) in Circle questions! DO Q3a, Q3b and Q3d as homework! 





Q6
See how to find the sum of Circumferences of circles WITHOUT having the diameter of each circle! 

Q9
After watching this video, you should be able to solve Q5, Q7, Q8, Q10 & Q11) better. Do remember to apply what you have learnt so far like:  Area of New shapes (Boomerang and halfleaf) learnt!  For perimeter> outline with highlighter. Tick by checking the outlined lines. To insert the correct fraction IN FRONT of the formula for the shape e.g. 1/4 for quadrant, 1/2 for semicircle, etc.  Cut & Paste techniques.  Use the correct pi as stated in the question.  Do NOT ASSUME the shape. Read the question for clues. Dare to accept the challenge? Try Q12 before listening to the video below! 

Q12
Did you get the answer as 138.51 cm2? If yes, GREAT JOB! CONGRATULATIONS! If you want to hear my applause to you, watch the video! :) If no, never mind! It is not an easy question. We learn along our way ya ;p So, watch the video and learn. FOr those who try, you see if you can be your OWN TEACHER and spot your mistakes?! If no... send your working to me and I will check for you! :) 
p6_circle_1_studentonline.pdf  
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Well ... there are so many things around you that are made of the shape of a circle! Look around! Can see some of them??! Give me some examples when I see you to claim for your stars! :)
You may grow up to become an architect or product designer which needs the shape of a circle! That is the reason why you need to learn how to calculate the area and circumference of a circle! Just like how you were taught to find the area and perimeter of a square, rectangle and triangle in P4 & P5! :) 

Pi can be expressed in 4 forms even though point (b), (c) and (d) are not mentioned in the video:
a) as decimal, i.e. 3.14 b) as fraction, i.e. 22/7 c) as calculator pi d) leave in terms of pi 



Have a break!
Let's hear a song about Circles, Radius, Diameter, Pi, circumference and area of a circle! Hope you like it! :) 

Watch this video for the answers for the Pop Quiz questions in Page 1 and Page 5.


Q2c)
If you have gotten the following answers for this qn, you may skip this video and proceed to work on Q2a, Q2b & Q2d. Pls take note of the instruction to use for the pi for EACH QUESTION. Answers: Shape: 3/4 of a circle Circumference: 12pi cm Perimeter: (12pi + 16) cm Area: 48pi cm2 

After watching this video, do Q3a & Q3b as hw.


After watching this video, do Q3d as hw.


You can try Q4 & Q6 first OR try these 2 questions AFTER you have watched this video!
For Q5, you will also learn how to solve a circle question when using the calculator value of pi!  How do you write it?  Do you round your answer off at EACH number statement? 

More than meets its eye!
We know that the fraction for a quadrant is 1/4. But where did it come from? Purely from the shape?! DO you know it can also come from ... Watch the video to find it out! ;p 

Dare the challenge! Try out Q8 first and see if you have gotten the following answers! If you do, WELL DONE! KEEP UP THE GOOD WORK! :)
Answers: a) 629 cm2 b) 118 cm 

Challenge Round (Optional)
If you want to learn more, try out this question first! Stuck?! Watch this video to solve the mystery! :) 