keely-doyle
Uploaded by
13 SLIDES
260 VUES
130LIKES

Understanding Circles: Key Concepts of Diameter, Radius, Circumference, and Pi

DESCRIPTION

Circles are a fundamental shape encountered in everyday life, and their properties can be described using specific vocabulary. The diameter is the distance through the center of the circle and is twice the length of the radius, which is half of the diameter. The ratio known as Pi (π) relates the circumference to the diameter. To calculate the circumference, you can use the formula C = 2πr or C = πd. For example, with a diameter of 10 cm, the circumference is approximately 31.4 cm. Understanding these concepts allows for better comprehension of geometry and its applications.

1 / 13

Télécharger la présentation

Understanding Circles: Key Concepts of Diameter, Radius, Circumference, and Pi

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Circles Circles are EVERYWHERE.

  2. VOCABULARY Diameter Radius Circumference Pi

  3. DIAMETER Diameter is the distance through the middle of the circle. It is twice as large as the radius. d =diameter r= radius

  4. Radius • Radius is ½ as large as the diameter. • R=1/2d • The radius is used in many circle formulas

  5. PI IS NOT : • A whole pie • A slice of pie

  6. PI • Pi is the ratio of the circumference to the diameter. This is the symbol for pi p

  7. The diameter of the quarter is 5.5cm. What is the circumference?

  8. AND THE ANSWER IS….. 17.27 cm

  9. Circumference • Circumference is the distance around the circle. To find the circumference of a circle You have to know the diameter or radius.

  10. Radius = 4cm Circumference = 2 X R X π Circumference= 2 X 4 X 3.14 C= 25.12 cm

  11. Diameter = 10cm C= π x D C= 3.14 x 10 C= 31.4 cm

  12. WHAT IS THE DIAMETER? Radius is 6 inches Diameter is 12 inches

  13. LET’S PRACTICE D= 24 INCHES R= 12 inches

More Related