Like this presentation? Why not share!

# Circle geometry

## on Jan 24, 2011

• 2,486 views

### Views

Total Views
2,486
Views on SlideShare
2,434
Embed Views
52

Likes
1
0
0

### 2 Embeds52

 http://web.henry.k12.va.us 34 http://mrchinawamba.webs.com 18

### Categories

Uploaded via as Microsoft PowerPoint

### Report content

• Comment goes here.
Are you sure you want to
Your message goes here

## Circle geometryPresentation Transcript

• Circle Geometry
By: Cameron Starcheski, Melanie Bender, and Sarah Somerville
• Terminology
• A ‘chord’ divides a circle into two arcs
Major (larger)
Minor (smaller)
• If the word ‘arc’ appears by itself, it means the minor arc
• An inscribed angle has its vertex on the circle and two chords from the arms
• The word ‘subtended’ is used when a third chord completes the triangle
• A ‘central angle’ has its vertex in the centre of the circle and its arms equal the radius
• Circle Theorem 1:
Perpendicular bisector of a chord passes through the center of the circle.
• Circle Theorem 2:
If two chords are congruent they are equidistant from the centre.
• Circle Theorem 3:
Measure of the central angle subtended by a chord is equal to twice the angle at the circumference.
• Circle Theorem 4:
Angle subtended by same arc are equal.
• Circle Theorem 5:
The angle subtended by a diameter is a right angle.