1 / 10

Warm-Up

Warm-Up. Find the area of the shaded region. Diameter = 8 inches. Geometry 11-2 and 11-3. Arcs. Definition. A central angle is an angle whose vertex is the center of a circle. An arc is the distance between two points on a circle. central angle: x arc: AC. Types of Arcs.

zeno
Download Presentation

Warm-Up

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. Warm-Up • Find the area of the shaded region. Diameter = 8 inches

  2. Geometry 11-2 and 11-3 Arcs

  3. Definition • A central angleis an angle whose vertex is the center of a circle. • An arcis the distance between two points on a circle. central angle: x arc: AC

  4. Types of Arcs • Minor arc: needs only two letters to name it • The measure of the arc is the same as the measure of the angle • Major arc: needs three letters to name it -more than half of the circle -measure = 360 - x Minor arc Major arc

  5. Example Find mKLF.

  6. Definition A sector area of a circle is the area of a shaded portion of the cirlce. Sector Area = (area of circle) x (fraction of circle shaded)

  7. Example • Find the area of the shaded sector JGH.

  8. Definition An arc length of a circle is the distance around a circle between two points. Arc length= (circumference of circle) x (fraction of circle)

  9. Example • Find the arc length of FG.

  10. Example • Richard is going to build a fence around a portion of his circular garden. How many feet of fence will Richard need to complete the job? 18 ft

More Related