9-5 - Numerical Relationships A radius is exactly one-half...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Circles and Circumference Lesson 9-5
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vocabulary A circle is a plane figure that consists of a set of points that are equidistant from a given point called the center. The circumference of a circle is the distance around it.
Background image of page 2
Identifying the Parts of a Circle A radius is a line segment that connects the outside of the circle to its center.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A diameter is a line segment with both endpoints on the circle that passes through the center.
Background image of page 4
A chord is a line segment whose endpoints are on the circle. Chords do not have to pass through the center of the circle. However, if a chord does pass through the center, it is also considered a diameter.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Numerical Relationships A radius is exactly one-half of a diameter. Therefore a diameter is twice a radius. 5.5 cm If the radius is 5.5 cm, then the diameter is ___________ cm. 11 Circumference Remember, circumference is the distance around the circle. If you divide a circles circumference by its diameter, you always get the same irrational number pi (symbol: ) This is true of every circle. We estimate pi to be 3.14 or the fraction 22/7. Circumference Formulas C = d C = 2 r Example 41 m C = d C = (3.14)(41) C = 128.74 m We substitute 3.14 in for pi. Homework Time...
View Full Document

This note was uploaded on 11/17/2011 for the course MATH 110 taught by Professor Staff during the Fall '08 term at BYU.

Page1 / 10

9-5 - Numerical Relationships A radius is exactly one-half...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online