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Kuala Lumpur

All About Circles

Home > PowerPoint Slides > All About Circles
Published in: Math | Mathematics
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Learn about the parts of a circle and how to construct it.

Narvindar J / Kuala Lumpur

5 years of teaching experience

Qualification: Degree and CICTL

Teaches: Mathematics, Science

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  1. Chapter 3: 2D Shapes and Angles 3.2: Identify Parts of a Circle
  2. LO: We are learning to identify parts of a arcte.
  3. 2. 3. 4. Success Criteria I am able to identify the circumference of a circle. I am able to identify the radius of a circle. I am able to identify the diameter of a circle. I know the length of the diameter is twice the length of the radius.
  4. 1. 2. Starter: Hot Potato A student will describe a quadrilateral shape. Then he/she will choose a student to answer. The student who answered will then describe another shape, and choose another student to answer.
  5. Let's watch a video.
  6. The Circumference of the Circle The outside of the circle is called the circumference. The circumference is the distance around the circle.
  7. The Center of the Circle The center of the circle is the middle point of the circle..
  8. The Radius of the Circle The radius is the line drawn from the center to the circumference.
  9. The Diameter of the Circle The diameter is a line drawn from one circumference through the center to another circumference.
  10. The Diameter of the Circle diameter radius The diameter cuts the circle in half! The length of the diameter is twice the length of the radius.
  11. Altogether, a circle Looks... circumference diamete centre radius
  12. Radius and Diameter Always remember that the diameter is twice the length of the radius. Shu Li and Taz used a rope to measure the distance between them. The distance is 2 m. So, the radius of the circle is 2 m. What's the diameter?
  13. Radius and Diameter Diameter: 2m + 2m: 4m or 2m x 2: 4m radius cen tre
  14. Lets try a few more Find the radius and diameter Of each circle CD Radius = Diameter CD Radius Diameter Radius = Diameter Radius Diameter = Radius = Diameter = Radius Diameter
  15. Chapter 3: 2D Shapes and Angles 3.2: Construct a Circle
  16. LO: We are learning to construct a circle.
  17. 2. 3. 4. Success Criteria I know the different parts of a compass. I know how to use a compass. I can draw a circle using a compass. I can label the circumference, radius, and diameter of a circle.
  18. Starter Parts of a circle
  19. Starter What If YOU Want The Most PIZZA? One 18 inch Large Pizza Two 12 inch Medium Pizzas 00 0 18 inches Let's teach it that way. MATH is VISUAL.COM
  20. What is a compass? Parts of a Compass A compass is a drawing tool used to draw circles. Hinge cuemath Pencil Hold for a pencil Compass needle
  21. Drawing a Circle Continuing Education: Drawing Circ(es with a Compass Real Math Solutions
  22. How to Draw a Circle with a Compass First we place our pencil in the holder and make sure the tip of the pencil and the needle are level. Then, we tighten the pencil holder grip so the pencil won't move around.
  23. How to Draw a Circle with a Compass Hold the top of the pair of compasses with your thumb and first finger. Place the needle onto the paper and gently spin the pencil around the needle, keeping the needle completely still.
  24. How to Draw a Circle with a Compass Have a go at drawing some of your own circles using your pair of compas
  25. How to Draw a Circle with a Compass When you are asked to draw a circle to a given rneasurerænt, you have to adjust the arrns the pair of compasses to the correct length. For example, to draw a circle with the radius of 4cm, you have to set the distance of the arms to 4cm using a ruler
  26. Try constructing your own circles using the following rneasurements: 2. 3. 4. 5. Radius: 3cm Diameter: 8cm Diameter: IOcm Radius: 2cm Diameter: 7cm
  27. Plenary Try drawing circles on the whiteboard without using the compass. Is it easier or harder? 2. Which circle looks tidier? 3. Why?

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