Circles

Judith Hilinski, Apr 7, 2020

Practice with basic vocabulary words associated with a circle

Table of Contents

  1. Vocabulary
    1. Essential Circle Vocabulary and Instruction
    2. Definition of A circle
    3. Radius
    4. Circumference
    5. Diameter and Radius
    6. The Crazy Circle Illusion: How are these dots moving? GeoGeb
  2. Quiz1
    1. Circle Parts Quiz
    2. Radius to Diameter
  3. Pi
    1. Radius to Circumference
    2. Measuring the Circumference
    3. Circle Circumference Exploration
  4. Quiz2
  5. Area of a Circle
    1. Area
  6. Math Problems: Circumference and Area
    1. Area-and-Circumference-word-problems2

1.

Vocabulary

Practice with basic terms regarding circles

  • 1. Essential Circle Vocabulary and Instruction
  • 2. Definition of A circle
  • 3. Radius
  • 4. Circumference
  • 5. Diameter and Radius
  • 6. The Crazy Circle Illusion: How are these dots moving? GeoGeb

1.1.

Essential Circle Vocabulary and Instruction

Essential Circle Vocabulary
– Judith Hilinski

1.2.

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1.3.

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1.4.

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1.5.

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1.6.

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2.

Quiz1

  • 1. Circle Parts Quiz
  • 2. Radius to Diameter

2.1.

Circle Parts Quiz

EasyS1
Easy-2
parts-easy-3
– Judith Hilinski

2.2.

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3.

Pi

  • 1. Radius to Circumference
  • 2. Measuring the Circumference
  • 3. Circle Circumference Exploration

3.1.

Radius to Circumference

[size=150][b][color=#ff0000][size=200]Which Point is at the Center of the Circle?[/size][/color][/b][/size]
[size=200][b][color=#0000ff]Make sure point A is on 0. Move point B to 2 on the x axis. [/color][/b][/size]
[size=200][b][color=#ff0000]What part of the circle is line segment AB?[/color][/b][/size]
[size=200][b][color=#ff0000]What is the measure of the Radius when point B is on 2? [br][/color][/b][/size]
[size=200][b][color=#0000ff]Keep point A on 0. Move point B to 4 on the x axis.[/color][/b][/size]
[b][color=#ff0000][size=200]What happens when you move point B from 2 to 4? [/size][/color][/b]
[size=200][b][color=#ff0000]When you move point B from 2 to 4, what happens to the length of the radius?[/color][/b][/size]
[size=200][b][color=#ff0000]As the length of the radius gets larger, the size of the circle ___________________[/color][/b][/size]
– Judith Hilinski

3.2.

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3.3.

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4.

Quiz2


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5.

Area of a Circle

  • 1. Area

5.1.

Area

[size=150][b][color=#ff0000]Suppose you are going to order pizza for a party. You want to make sure to have enough for everyone. Will you get more pizza if you order an 18 inch pizza or two 12 inch [/color][/b][/size]
– Judith Hilinski

6.

Math Problems: Circumference and Area

  • 1. Area-and-Circumference-word-problems2

6.1.

Area-and-Circumference-word-problems2

Area-and-Circumference-word-problems2
– Judith Hilinski

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