Geometry Unit 5 Circles
Published on Dec 04, 2015
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MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
CIRCLE
- The locus of all points that are a fixed distance from a given point
- Real world ex. CD or Ferris wheel
Photo by D-Gernz
RADIUS
- A line segment between the center and a point on the circle or sphere
- Real world ex. Half way through Mars
DIAMETER
- Line segment between 2 points on a circle; passes through the center
- Real world ex. Line through a basketball
CENTRAL ANGLE
- An angle in a circle with vertex at the circle's center
- Real world ex. Bike spokes
SEMI CIRCLE
- Half a circle. That is, a 180° arc
- Real world ex. Half a pizza
CIRCUMFERENCE
- A complete circular arc
ARC LENGTH
- The measure of the central angle
SECTOR
- A part of the interior of a circle bounded by two radii and an arc
SEGMENT
- A part of the interior of a circle bounded by a chord and an arc
TANGENT LINE
- A line that touches a curve at a point without crossing over
POINT OF TANGENCY
- A line tangent to a circle that is perpendicular to the radius
CHORD
- A line segment on the interior of a circle
SECANT
- A line which passes through at least two points of a curve
